wip

CryptoExchange.Net/CryptoExchange.Net.csproj

@@ -6,9 +6,9 @@
     <PackageId>CryptoExchange.Net</PackageId>
     <Authors>JKorf</Authors>
     <Description>CryptoExchange.Net is a base library which is used to implement different cryptocurrency (exchange) API's. It provides a standardized way of implementing different API's, which results in a very similar experience for users of the API implementations.</Description>
-    <PackageVersion>10.5.3</PackageVersion>
-    <AssemblyVersion>10.5.3</AssemblyVersion>
-    <FileVersion>10.5.3</FileVersion>
+    <PackageVersion>10.6.0</PackageVersion>
+    <AssemblyVersion>10.6.0</AssemblyVersion>
+    <FileVersion>10.6.0</FileVersion>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
     <PackageTags>OKX;OKX.Net;Mexc;Mexc.Net;Kucoin;Kucoin.Net;Kraken;Kraken.Net;Huobi;Huobi.Net;CoinEx;CoinEx.Net;Bybit;Bybit.Net;Bitget;Bitget.Net;Bitfinex;Bitfinex.Net;Binance;Binance.Net;CryptoCurrency;CryptoCurrency Exchange;CryptoExchange.Net</PackageTags>
     <RepositoryType>git</RepositoryType>

CryptoExchange.Net/ExchangeHelpers.cs

@@ -450,20 +450,6 @@ namespace CryptoExchange.Net
             };
         }
 
-        // Without date/time filter
-        public static PageRequest? GetNextPageRequestPageSimple(
-            PageRequest? currentPageRequest,
-            bool hasNextPage,
-            IEnumerable<DateTime> timeSelector,
-            DateTime? requestStartTime,
-            DateTime? requestEndTime
-            )
-        {
-            if (CheckForNextPage(timeSelector, requestStartTime, requestEndTime, limit, direction))
-            {
-            }
-        }
-
         public static PageRequest? GetNextPageRequest(
             Func<PageRequest> normalNextPageCallback,
             int responseLength,

CryptoExchange.Net/OrderBook/SymbolOrderBook.cs

@@ -448,6 +448,9 @@ namespace CryptoExchange.Net.OrderBook
             DateTime? serverDataTime = null,
             DateTime? localDataTime = null)
         {
+            if (Status == OrderBookStatus.Disposed || Status == OrderBookStatus.Disconnected)
+                throw new InvalidOperationException("Trying to set snapshot while book is not working");
+
             _processQueue.Enqueue(
                 new OrderBookSnapshot
                 {
@@ -475,6 +478,9 @@ namespace CryptoExchange.Net.OrderBook
             DateTime? serverDataTime = null,
             DateTime? localDataTime = null)
         {
+            if (Status == OrderBookStatus.Disposed || Status == OrderBookStatus.Disconnected)
+                throw new InvalidOperationException("Trying to update order book while book is not working");
+
             _processQueue.Enqueue(
                 new OrderBookUpdate
                 { 
@@ -505,6 +511,9 @@ namespace CryptoExchange.Net.OrderBook
             DateTime? serverDataTime = null,
             DateTime? localDataTime = null)
         {
+            if (Status == OrderBookStatus.Disposed || Status == OrderBookStatus.Disconnected)
+                throw new InvalidOperationException("Trying to update order book while book is not working");
+
             _processQueue.Enqueue(
                 new OrderBookUpdate
                 {
@@ -531,6 +540,9 @@ namespace CryptoExchange.Net.OrderBook
             DateTime? serverDataTime = null,
             DateTime? localDataTime = null)
         {
+            if (Status == OrderBookStatus.Disposed || Status == OrderBookStatus.Disconnected)
+                throw new InvalidOperationException("Trying to update order book while book is not working");
+
             var highest = Math.Max(bids.Any() ? bids.Max(b => b.Sequence) : 0, asks.Any() ? asks.Max(a => a.Sequence) : 0);
             var lowest = Math.Min(bids.Any() ? bids.Min(b => b.Sequence) : long.MaxValue, asks.Any() ? asks.Min(a => a.Sequence) : long.MaxValue);
 
@@ -554,6 +566,9 @@ namespace CryptoExchange.Net.OrderBook
         /// <param name="sequenceNumber">The sequence number of the message if it's a separate message with separate number</param>
         protected void AddChecksum(int checksum, long? sequenceNumber = null)
         {
+            if (Status == OrderBookStatus.Disposed || Status == OrderBookStatus.Disconnected)
+                throw new InvalidOperationException("Trying to add checksum while book is not working");
+
             _processQueue.Enqueue(new OrderBookChecksum() { Checksum = checksum, SequenceNumber = sequenceNumber });
             _queueEvent.Set();
         }

CryptoExchange.Net/SharedApis/Models/Pagination.cs

@@ -14,6 +14,7 @@ namespace CryptoExchange.Net.SharedApis
 
     public record PaginationParameters
     {
+        public DataDirection Direction { get; set; }
         public DateTime? StartTime { get; set; }
         public DateTime? EndTime { get; set; }
         public string? FromId { get; set; }
@@ -39,5 +40,190 @@ namespace CryptoExchange.Net.SharedApis
         public static PageRequest NextStartTimeAsc(IEnumerable<DateTime> timestampSelector) => new PageRequest { StartTime = timestampSelector.Max().AddMilliseconds(1) };
         public static PageRequest NextEndTimeDesc(IEnumerable<DateTime> timestampSelector) => new PageRequest { EndTime = timestampSelector.Min().AddMilliseconds(-1) };
     }
+    
+    public static class Pagination
+    {
+        public static PaginationParameters GetPaginationParameters(
+            DataDirection direction,
+            DateTime? requestStartTime,
+            DateTime requestEndTime,
+            PageRequest? paginationRequest, 
+            bool setOtherTimeLimiter = true,
+            TimeSpan? maxPeriod = null
+            )
+        {
+            var startTime = paginationRequest?.StartTime ?? requestStartTime;
+            var endTime = paginationRequest?.EndTime ?? requestEndTime;
+            if (maxPeriod != null)
+            {
+                if (direction == DataDirection.Ascending)
+                {
+                    if (startTime == null)
+                        startTime = endTime.Add(-maxPeriod.Value);
+                    else
+                        endTime = startTime.Value.Add(maxPeriod.Value);
+                }
+                else
+                {
+                    startTime = endTime.Add(-maxPeriod.Value);
+                }
+            }
 
+            return new PaginationParameters
+            {
+                StartTime = direction == DataDirection.Ascending || setOtherTimeLimiter ? startTime : null,
+                EndTime = direction == DataDirection.Descending || setOtherTimeLimiter ? endTime : null,
+                Direction = direction,
+                FromId = paginationRequest?.FromId,
+                Offset = paginationRequest?.Offset,
+                Page = paginationRequest?.Page
+            };
+        }
+
+        public static PageRequest? GetNextPageRequest(
+            Func<PageRequest> nextPageRequest,
+            int resultCount,
+            IEnumerable<DateTime> timestamps,
+            DateTime? requestStartTime,
+            DateTime requestEndTime,
+            int limit,
+            DataDirection direction,
+            PaginationParameters lastPaginationData,
+            TimeSpan? maxTimespan = null
+            )
+        {
+            if (HasNextPage(resultCount, timestamps, requestStartTime, requestEndTime, limit, direction))
+                return nextPageRequest();
+
+            if (maxTimespan != null)
+            {
+                if (HasNextPeriod(requestStartTime, requestEndTime, direction, lastPaginationData, maxTimespan.Value))
+                {
+                    var (startTime, endTime) = GetNextPeriod(requestStartTime, requestEndTime, direction, lastPaginationData, maxTimespan.Value);
+                    return new PageRequest
+                    {
+                        StartTime = startTime,
+                        EndTime = endTime
+                    };
+                }
+            }
+
+            return null;
+        }
+
+        public static bool HasNextPage(
+            int resultCount,
+            IEnumerable<DateTime> timestamps,
+            DateTime? requestStartTime,
+            DateTime requestEndTime,
+            int limit,
+            DataDirection direction)
+        {
+            if (resultCount < limit)
+                return false;
+
+            if (!timestamps.Any()) //?
+                return false;
+
+            if (direction == DataDirection.Ascending)
+            {
+                if (timestamps.Max() >= requestEndTime)
+                    return false;
+
+                return true;
+            }
+            else
+            {
+                if (timestamps.Min() < requestStartTime)
+                    return false;
+
+                return true;
+            }
+        }
+
+        public static PageRequest NextPageFromPage(PaginationParameters lastPaginationData)
+        {
+            return new PageRequest { Page = lastPaginationData.Page + 1 };
+        }
+        public static PageRequest NextPageFromOffset(PaginationParameters lastPaginationData, int resultCount)
+        {
+            return new PageRequest { Offset = lastPaginationData.Offset + resultCount };
+        }
+        public static PageRequest NextPageFromCursor(string nextCursor)
+        {
+            return new PageRequest { Cursor = nextCursor };
+        }
+        public static PageRequest NextPageFromId(long nextFromId)
+        {
+            return new PageRequest { FromId = nextFromId.ToString() };
+        }
+        public static PageRequest NextPageFromId(string nextFromId)
+        {
+            return new PageRequest { FromId = nextFromId };
+        }
+        public static PageRequest NextPageFromTime(PaginationParameters lastPaginationData, DateTime lastTimestamp, bool setOtherTimeLimiter)
+        {
+            if (lastPaginationData.Direction == DataDirection.Ascending)
+                return new PageRequest { StartTime = lastTimestamp.AddMilliseconds(1), EndTime = setOtherTimeLimiter ? lastPaginationData.EndTime : null  };
+            else
+                return new PageRequest { EndTime = lastTimestamp.AddMilliseconds(-1), StartTime = setOtherTimeLimiter ? lastPaginationData.StartTime : null };
+        }
+
+        public static bool HasNextPeriod(
+            DateTime? requestStartTime,
+            DateTime requestEndTime,
+            DataDirection direction,
+            PaginationParameters lastPaginationParameters,
+            TimeSpan period)
+        {
+            if (direction == DataDirection.Ascending && lastPaginationParameters.StartTime == null)
+                throw new Exception();
+
+            if (direction == DataDirection.Ascending)
+            {
+                return (requestEndTime - lastPaginationParameters.EndTime!.Value).TotalSeconds > 1;
+            }
+            else
+            {
+                if (requestStartTime != null)
+                    return (lastPaginationParameters.StartTime!.Value - requestStartTime.Value).TotalSeconds > 1;
+                else
+                    return (lastPaginationParameters.StartTime!.Value - (lastPaginationParameters.EndTime!.Value - period)).TotalSeconds > 1;
+            }
+        }
+
+        public static (DateTime? startTime, DateTime? endTime) GetNextPeriod(
+            DateTime? requestStartTime,
+            DateTime requestEndTime,
+            DataDirection direction,
+            PaginationParameters lastPaginationParameters,
+            TimeSpan period
+            )
+        {
+            DateTime? nextStartTime = null;
+            DateTime? nextEndTime = null;
+            if (direction == DataDirection.Ascending)
+            {
+                if (lastPaginationParameters.StartTime != null)
+                    nextStartTime = lastPaginationParameters.StartTime.Value.Add(period);
+                if (lastPaginationParameters.EndTime != null)
+                    nextEndTime = lastPaginationParameters.EndTime.Value.Add(period);
+            }
+            else
+            {
+                if (lastPaginationParameters.StartTime != null)
+                    nextStartTime = lastPaginationParameters.StartTime.Value.Add(-period);
+                if (lastPaginationParameters.EndTime != null)
+                    nextEndTime = lastPaginationParameters.EndTime.Value.Add(-period);
+            }
+
+            if (nextStartTime != null && nextStartTime < requestStartTime)
+                nextStartTime = requestStartTime;
+
+            if (nextEndTime != null && nextEndTime > requestEndTime)
+                nextEndTime = requestEndTime;
+
+            return (nextStartTime, nextEndTime);
+        }
+    }
 }

CryptoExchange.Net/Sockets/Default/SocketConnection.cs

@@ -1103,6 +1103,12 @@ namespace CryptoExchange.Net.Sockets.Default
             return CallResult.SuccessResult;
         }
 
+        /// <summary>
+        /// Try to subscribe a new subscription by sending the subscribe query and wait for the result as needed
+        /// </summary>
+        /// <param name="subscription">The subscription</param>
+        /// <param name="newSubscription">Whether this is a new subscription, or an existing subscription (resubscribing on reconnected socket)</param>
+        /// <param name="subCancelToken">Cancellation token</param>
         protected internal async Task<CallResult> TrySubscribeAsync(Subscription subscription, bool newSubscription, CancellationToken subCancelToken)
         {
             subscription.ConnectionInvocations = 0;

CryptoExchange.Net/Trackers/UserData/Interfaces/IUserDataTracker.cs

@@ -16,13 +16,6 @@ namespace CryptoExchange.Net.Trackers.UserData.Interfaces
         /// </summary>
         bool Connected { get; }
 
-        /// <summary>
-        /// Currently tracked symbols. Data for these symbols will be requested when polling. 
-        /// Websocket updates will be available for all symbols regardless.
-        /// When new data is received for a symbol which is not yet being tracked it will be added to this list and polled in the future unless the `OnlyTrackProvidedSymbols` option is set in the configuration.
-        /// </summary>
-        IEnumerable<SharedSymbol> TrackedSymbols { get; }
-
         /// <summary>
         /// On connection status change. Might trigger multiple times with the same status depending on the underlying subscriptions.
         /// </summary>

CryptoExchange.Net/Trackers/UserData/Interfaces/IUserFuturesDataTracker.cs

@@ -2,6 +2,7 @@
 using CryptoExchange.Net.SharedApis;
 using CryptoExchange.Net.Trackers.UserData.Objects;
 using System;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace CryptoExchange.Net.Trackers.UserData.Interfaces
@@ -26,6 +27,13 @@ namespace CryptoExchange.Net.Trackers.UserData.Interfaces
         /// </summary>
         public string Exchange { get; }
 
+        /// <summary>
+        /// Currently tracked symbols. Data for these symbols will be requested when polling. 
+        /// Websocket updates will be available for all symbols regardless.
+        /// When new data is received for a symbol which is not yet being tracked it will be added to this list and polled in the future unless the `OnlyTrackProvidedSymbols` option is set in the configuration.
+        /// </summary>
+        IEnumerable<SharedSymbol> TrackedSymbols { get; }
+
         /// <summary>
         /// Balances tracker
         /// </summary>
@@ -57,5 +65,18 @@ namespace CryptoExchange.Net.Trackers.UserData.Interfaces
         /// </summary>
         /// <returns></returns>
         Task StopAsync();
+
+        /// <summary>
+        /// Add symbols to the list of symbols for which data is being tracked
+        /// </summary>
+        /// <param name="symbols">Symbols to add</param>
+        void AddTrackedSymbolsAsync(IEnumerable<SharedSymbol> symbols);
+
+        /// <summary>
+        /// Remove a symbol from the list of symbols for which data is being tracked. 
+        /// Note that the symbol will be added again if new data for that symbol is received, unless the OnlyTrackProvidedSymbols option has been set to true.
+        /// </summary>
+        /// <param name="symbol">Symbol to remove</param>
+        void RemoveTrackedSymbolAsync(SharedSymbol symbol);
     }
 }

CryptoExchange.Net/Trackers/UserData/Interfaces/IUserSpotDataTracker.cs

@@ -2,6 +2,7 @@
 using CryptoExchange.Net.SharedApis;
 using CryptoExchange.Net.Trackers.UserData.Objects;
 using System;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace CryptoExchange.Net.Trackers.UserData.Interfaces
@@ -26,6 +27,13 @@ namespace CryptoExchange.Net.Trackers.UserData.Interfaces
         /// </summary>
         public string Exchange { get; }
 
+        /// <summary>
+        /// Currently tracked symbols. Data for these symbols will be requested when polling. 
+        /// Websocket updates will be available for all symbols regardless.
+        /// When new data is received for a symbol which is not yet being tracked it will be added to this list and polled in the future unless the `OnlyTrackProvidedSymbols` option is set in the configuration.
+        /// </summary>
+        IEnumerable<SharedSymbol> TrackedSymbols { get; }
+
         /// <summary>
         /// Balances tracker
         /// </summary>
@@ -53,5 +61,18 @@ namespace CryptoExchange.Net.Trackers.UserData.Interfaces
         /// </summary>
         /// <returns></returns>
         Task StopAsync();
+
+        /// <summary>
+        /// Add symbols to the list of symbols for which data is being tracked
+        /// </summary>
+        /// <param name="symbols">Symbols to add</param>
+        void AddTrackedSymbolsAsync(IEnumerable<SharedSymbol> symbols);
+
+        /// <summary>
+        /// Remove a symbol from the list of symbols for which data is being tracked. 
+        /// Note that the symbol will be added again if new data for that symbol is received, unless the OnlyTrackProvidedSymbols option has been set to true.
+        /// </summary>
+        /// <param name="symbol">Symbol to remove</param>
+        void RemoveTrackedSymbolAsync(SharedSymbol symbol);
     }
 }

CryptoExchange.Net/Trackers/UserData/ItemTrackers/BalanceTracker.cs

@@ -22,12 +22,13 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
         /// </summary>
         public BalanceTracker(
             ILogger logger,
+            UserDataSymbolTracker symbolTracker,
             IBalanceRestClient restClient,
             IBalanceSocketClient? socketClient,
             SharedAccountType accountType,
             TrackerItemConfig config,
             ExchangeParameters? exchangeParameters = null
-            ) : base(logger, UserDataType.Balances, restClient.Exchange, config, false, null)
+            ) : base(logger, symbolTracker, UserDataType.Balances, restClient.Exchange, config)
         {
             if (_socketClient == null)
                 config = config with { PollIntervalConnected = config.PollIntervalDisconnected };

CryptoExchange.Net/Trackers/UserData/ItemTrackers/FuturesOrderTracker.cs

@@ -28,13 +28,14 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
         /// </summary>
         public FuturesOrderTracker(
             ILogger logger,
+            UserDataSymbolTracker symbolTracker,
             IFuturesOrderRestClient restClient,
             IFuturesOrderSocketClient? socketClient,
             TrackerItemConfig config,
             IEnumerable<SharedSymbol> symbols,
             bool onlyTrackProvidedSymbols,
             ExchangeParameters? exchangeParameters = null
-            ) : base(logger, UserDataType.Orders, restClient.Exchange, config, onlyTrackProvidedSymbols, symbols)
+            ) : base(logger, symbolTracker, UserDataType.Orders, restClient.Exchange, config)
         {
             if (_socketClient == null)
                 config = config with { PollIntervalConnected = config.PollIntervalDisconnected };
@@ -46,6 +47,20 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             _requiresSymbolParameterOpenOrders = restClient.GetOpenFuturesOrdersOptions.RequiredOptionalParameters.Any(x => x.Name == "Symbol");
         }
 
+        internal void ClearDataForSymbol(SharedSymbol symbol)
+        {
+            foreach (var order in _store)
+            {
+                if (order.Value.SharedSymbol!.TradingMode == symbol.TradingMode
+                    && order.Value.SharedSymbol.BaseAsset == symbol.BaseAsset
+                    && order.Value.SharedSymbol.QuoteAsset == symbol.QuoteAsset
+                    && order.Value.SharedSymbol.DeliverTime == symbol.DeliverTime)
+                {
+                    _store.TryRemove(order.Key, out _);
+                }
+            }
+        }
+
         /// <inheritdoc />
         protected override bool Update(SharedFuturesOrder existingItem, SharedFuturesOrder updateItem)
         {
@@ -234,7 +249,7 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             }
             else
             {
-                foreach (var symbol in _symbols.ToList())
+                foreach (var symbol in _symbolTracker.GetTrackedSymbols())
                 {
                     var openOrdersResult = await _restClient.GetOpenFuturesOrdersAsync(new GetOpenOrdersRequest(symbol, exchangeParameters: _exchangeParameters)).ConfigureAwait(false);
                     if (!openOrdersResult.Success)
@@ -272,7 +287,7 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             }
 
             var updatedPollTime = DateTime.UtcNow;
-            foreach (var symbol in _symbols.ToList())
+            foreach (var symbol in _symbolTracker.GetTrackedSymbols())
             {
                 DateTime? fromTimeOrders = GetClosedOrdersRequestStartTime(symbol);
 
@@ -373,7 +388,14 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
                 source = "StartTime";
             }
 
-            _logger.LogTrace("{DataType} UserDataTracker poll startTime filter based on {Source}: {Time:yyyy-MM-dd HH:mm:ss.fff}", DataType, source, fromTime);
+            if (DateTime.UtcNow - fromTime < TimeSpan.FromSeconds(1))
+            {
+                // Set it to at least 5 seconds in the past to prevent issues when local time isn't in sync
+                fromTime = DateTime.UtcNow.AddSeconds(-5);
+            }
+
+            _logger.LogTrace("{DataType}.{Symbol} UserDataTracker poll startTime filter based on {Source}: {Time:yyyy-MM-dd HH:mm:ss.fff}",
+                DataType, $"{symbol.BaseAsset}/{symbol.QuoteAsset}", source, fromTime);
             return fromTime!.Value;
         }
     }

CryptoExchange.Net/Trackers/UserData/ItemTrackers/FuturesUserTradeTracker.cs

@@ -26,13 +26,14 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
         /// </summary>
         public FuturesUserTradeTracker(
             ILogger logger,
+            UserDataSymbolTracker symbolTracker,
             IFuturesOrderRestClient restClient,
             IUserTradeSocketClient? socketClient,
             TrackerItemConfig config,
             IEnumerable<SharedSymbol> symbols,
             bool onlyTrackProvidedSymbols,
             ExchangeParameters? exchangeParameters = null
-            ) : base(logger, UserDataType.Trades, restClient.Exchange, config, onlyTrackProvidedSymbols, symbols)
+            ) : base(logger, symbolTracker, UserDataType.Trades, restClient.Exchange, config)
         {
             if (_socketClient == null)
                 config = config with { PollIntervalConnected = config.PollIntervalDisconnected };
@@ -42,6 +43,20 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             _exchangeParameters = exchangeParameters;
         }
 
+        internal void ClearDataForSymbol(SharedSymbol symbol)
+        {
+            foreach (var order in _store)
+            {
+                if (order.Value.SharedSymbol!.TradingMode == symbol.TradingMode
+                    && order.Value.SharedSymbol.BaseAsset == symbol.BaseAsset
+                    && order.Value.SharedSymbol.QuoteAsset == symbol.QuoteAsset
+                    && order.Value.SharedSymbol.DeliverTime == symbol.DeliverTime)
+                {
+                    _store.TryRemove(order.Key, out _);
+                }
+            }
+        }
+
         /// <inheritdoc />
         protected override string GetKey(SharedUserTrade item) => item.Id;
         /// <inheritdoc />
@@ -57,7 +72,7 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             var anyError = false;
             var fromTimeTrades = GetTradesRequestStartTime();
             var updatedPollTime = DateTime.UtcNow;
-            foreach (var symbol in _symbols)
+            foreach (var symbol in _symbolTracker.GetTrackedSymbols())
             {
                 var tradesResult = await _restClient.GetFuturesUserTradesAsync(new GetUserTradesRequest(symbol, startTime: fromTimeTrades, exchangeParameters: _exchangeParameters)).ConfigureAwait(false);
                 if (!tradesResult.Success)
@@ -116,6 +131,13 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
                 source = "StartTime";
             }
 
+            var now = DateTime.UtcNow;
+            if (now - fromTime < TimeSpan.FromSeconds(1))
+            {
+                // Set it to at least 5 seconds in the past to prevent issues when local time isn't in sync
+                fromTime = DateTime.UtcNow.AddSeconds(-5);
+            }
+
             _logger.LogTrace("{DataType} UserDataTracker poll startTime filter based on {Source}: {Time:yyyy-MM-dd HH:mm:ss.fff}", DataType, source, fromTime);
             return fromTime!.Value;
         }

CryptoExchange.Net/Trackers/UserData/ItemTrackers/PositionTracker.cs

@@ -29,6 +29,7 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
         /// </summary>
         public PositionTracker(
             ILogger logger,
+            UserDataSymbolTracker symbolTracker,
             IFuturesOrderRestClient restClient,
             IPositionSocketClient? socketClient,
             TrackerItemConfig config,
@@ -36,7 +37,7 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             bool onlyTrackProvidedSymbols,
             bool websocketPositionUpdatesAreFullSnapshots,
             ExchangeParameters? exchangeParameters = null
-            ) : base(logger, UserDataType.Positions, restClient.Exchange, config, onlyTrackProvidedSymbols, symbols)
+            ) : base(logger, symbolTracker, UserDataType.Positions, restClient.Exchange, config)
         {
             if (_socketClient == null)
                 config = config with { PollIntervalConnected = config.PollIntervalDisconnected };
@@ -118,9 +119,9 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
                     {
                         toRemove ??= new List<SharedPosition>();
                         toRemove.Add(item);
+                        _logger.LogTrace("Ignoring {DataType} update for {Key}, no SharedSymbol set", DataType, item.Symbol);
                     }
-                    else if (_onlyTrackProvidedSymbols
-                        && !_symbols.Any(y => y.TradingMode == symbolModel.SharedSymbol!.TradingMode && y.BaseAsset == symbolModel.SharedSymbol.BaseAsset && y.QuoteAsset == symbolModel.SharedSymbol.QuoteAsset))
+                    else if (!_symbolTracker.ShouldProcess(symbolModel.SharedSymbol))
                     {
                         toRemove ??= new List<SharedPosition>();
                         toRemove.Add(item);
@@ -131,8 +132,7 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             if (toRemove != null)
                 @event = @event.Except(toRemove).ToArray();
 
-            if (!_onlyTrackProvidedSymbols)
-                UpdateSymbolsList(@event.Where(x => x.PositionSize > 0).OfType<SharedSymbolModel>().Select(x => x.SharedSymbol!));
+            _symbolTracker.UpdateTrackedSymbols(@event.Where(x => x.PositionSize > 0).OfType<SharedSymbolModel>().Select(x => x.SharedSymbol!));
             
 
             // Update local store

CryptoExchange.Net/Trackers/UserData/ItemTrackers/SpotOrderTracker.cs

@@ -28,13 +28,14 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
         /// </summary>
         public SpotOrderTracker(
             ILogger logger,
+            UserDataSymbolTracker symbolTracker,
             ISpotOrderRestClient restClient,
             ISpotOrderSocketClient? socketClient,
             TrackerItemConfig config,
             IEnumerable<SharedSymbol> symbols,
             bool onlyTrackProvidedSymbols,
             ExchangeParameters? exchangeParameters = null
-            ) : base(logger, UserDataType.Orders, restClient.Exchange, config, onlyTrackProvidedSymbols, symbols)
+            ) : base(logger, symbolTracker, UserDataType.Orders, restClient.Exchange, config)
         {
             if (_socketClient == null)
                 config = config with { PollIntervalConnected = config.PollIntervalDisconnected };
@@ -46,6 +47,19 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             _requiresSymbolParameterOpenOrders = restClient.GetOpenSpotOrdersOptions.RequiredOptionalParameters.Any(x => x.Name == "Symbol");
         }
 
+        internal void ClearDataForSymbol(SharedSymbol symbol)
+        {
+            foreach(var order in _store)
+            {
+                if (order.Value.SharedSymbol!.TradingMode == symbol.TradingMode
+                    && order.Value.SharedSymbol.BaseAsset == symbol.BaseAsset
+                    && order.Value.SharedSymbol.QuoteAsset == symbol.QuoteAsset)
+                {
+                    _store.TryRemove(order.Key, out _);
+                }
+            }
+        }
+
         /// <inheritdoc />
         protected override bool Update(SharedSpotOrder existingItem, SharedSpotOrder updateItem)
         {
@@ -245,7 +259,7 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             }
             else
             {
-                foreach (var symbol in _symbols.ToList())
+                foreach (var symbol in _symbolTracker.GetTrackedSymbols())
                 {
                     var openOrdersResult = await _restClient.GetOpenSpotOrdersAsync(new GetOpenOrdersRequest(symbol, exchangeParameters: _exchangeParameters)).ConfigureAwait(false);
                     if (!openOrdersResult.Success)
@@ -283,7 +297,7 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             }
 
             var updatedPollTime = DateTime.UtcNow;
-            foreach (var symbol in _symbols.ToList())
+            foreach (var symbol in _symbolTracker.GetTrackedSymbols())
             {
                 DateTime? fromTimeOrders = GetClosedOrdersRequestStartTime(symbol);
 
@@ -385,7 +399,14 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
                 source = "StartTime";
             }
 
-            _logger.LogTrace("{DataType} UserDataTracker poll startTime filter based on {Source}: {Time:yyyy-MM-dd HH:mm:ss.fff}", DataType, source, fromTime);
+            if (DateTime.UtcNow - fromTime < TimeSpan.FromSeconds(1))
+            {
+                // Set it to at least 5 seconds in the past to prevent issues when local time isn't in sync
+                fromTime = DateTime.UtcNow.AddSeconds(-5);
+            }
+
+            _logger.LogTrace("{DataType}.{Symbol} UserDataTracker poll startTime filter based on {Source}: {Time:yyyy-MM-dd HH:mm:ss.fff}",
+                DataType, $"{symbol.BaseAsset}/{symbol.QuoteAsset}", source, fromTime);
             return fromTime!.Value;
         }
     }

CryptoExchange.Net/Trackers/UserData/ItemTrackers/SpotUserTradeTracker.cs

@@ -26,13 +26,14 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
         /// </summary>
         public SpotUserTradeTracker(
             ILogger logger,
+            UserDataSymbolTracker symbolTracker,
             ISpotOrderRestClient restClient,
             IUserTradeSocketClient? socketClient,
             TrackerItemConfig config,
             IEnumerable<SharedSymbol> symbols,
             bool onlyTrackProvidedSymbols,
             ExchangeParameters? exchangeParameters = null
-            ) : base(logger, UserDataType.Trades, restClient.Exchange, config, onlyTrackProvidedSymbols, symbols)
+            ) : base(logger, symbolTracker, UserDataType.Trades, restClient.Exchange, config)
         {
             if (_socketClient == null)
                 config = config with { PollIntervalConnected = config.PollIntervalDisconnected };
@@ -42,6 +43,19 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             _exchangeParameters = exchangeParameters;
         }
 
+        internal void ClearDataForSymbol(SharedSymbol symbol)
+        {
+            foreach (var trade in _store)
+            {
+                if (trade.Value.SharedSymbol!.TradingMode == symbol.TradingMode
+                    && trade.Value.SharedSymbol.BaseAsset == symbol.BaseAsset
+                    && trade.Value.SharedSymbol.QuoteAsset == symbol.QuoteAsset)
+                {
+                    _store.TryRemove(trade.Key, out _);
+                }
+            }
+        }
+
         /// <inheritdoc />
         protected override string GetKey(SharedUserTrade item) => item.Id;
         /// <inheritdoc />
@@ -57,7 +71,7 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             var anyError = false;
             var fromTimeTrades = GetTradesRequestStartTime();
             var updatedPollTime = DateTime.UtcNow;
-            foreach (var symbol in _symbols)
+            foreach (var symbol in _symbolTracker.GetTrackedSymbols())
             {
                 var tradesResult = await _restClient.GetSpotUserTradesAsync(new GetUserTradesRequest(symbol, startTime: fromTimeTrades, exchangeParameters: _exchangeParameters)).ConfigureAwait(false);
                 if (!tradesResult.Success)
@@ -114,6 +128,12 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
                 source = "StartTime";
             }
 
+            if (DateTime.UtcNow - fromTime < TimeSpan.FromSeconds(1))
+            {
+                // Set it to at least 5 seconds in the past to prevent issues when local time isn't in sync
+                fromTime = DateTime.UtcNow.AddSeconds(-5);
+            }
+
             _logger.LogTrace("{DataType} UserDataTracker poll startTime filter based on {Source}: {Time:yyyy-MM-dd HH:mm:ss.fff}", DataType, source, fromTime);
             return fromTime!.Value;
         }

CryptoExchange.Net/Trackers/UserData/ItemTrackers/UserDataItemTracker.cs

@@ -203,21 +203,14 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
         /// </summary>
         protected ConcurrentDictionary<string, T> _store = new ConcurrentDictionary<string, T>(StringComparer.InvariantCultureIgnoreCase);
         /// <summary>
-        /// Tracked symbols list
-        /// </summary>
-        protected readonly List<SharedSymbol> _symbols;
-        /// <summary>
-        /// Symbol lock
-        /// </summary>
-        protected object _symbolLock = new object();
-        /// <summary>
-        /// Only track provided symbols setting
-        /// </summary>
-        protected bool _onlyTrackProvidedSymbols;
-        /// <summary>
         /// Is SharedSymbol model
         /// </summary>
         protected bool _isSymbolModel;
+        /// <summary>
+        /// Symbol tracker
+        /// </summary>
+
+        protected readonly UserDataSymbolTracker _symbolTracker;
 
         /// <inheritdoc />
         public T[] Values
@@ -240,22 +233,23 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
 
         /// <inheritdoc />
         public event Func<UserDataUpdate<T[]>, Task>? OnUpdate;
-        /// <inheritdoc />
-        public IEnumerable<SharedSymbol> TrackedSymbols => _symbols;
 
         /// <summary>
         /// ctor
         /// </summary>
-        public UserDataItemTracker(ILogger logger, UserDataType dataType, string exchange, TrackerItemConfig config, bool onlyTrackProvidedSymbols, IEnumerable<SharedSymbol>? symbols) : base(logger, dataType, exchange)
+        public UserDataItemTracker(
+            ILogger logger,
+            UserDataSymbolTracker symbolTracker,
+            UserDataType dataType,
+            string exchange,
+            TrackerItemConfig config) : base(logger, dataType, exchange)
         {
-            _onlyTrackProvidedSymbols = onlyTrackProvidedSymbols;
-            _symbols = symbols?.ToList() ?? [];
-
             _pollIntervalDisconnected = config.PollIntervalDisconnected;
             _pollIntervalConnected = config.PollIntervalConnected;
             _pollAtStart = config.PollAtStart;
             _retentionTime = config is TrackerTimedItemConfig timeConfig ? timeConfig.RetentionTime : TimeSpan.MaxValue;
             _isSymbolModel = typeof(T).IsSubclassOf(typeof(SharedSymbolModel));
+            _symbolTracker = symbolTracker;
         }
 
         /// <summary>
@@ -334,26 +328,7 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
         /// Get the age of an item
         /// </summary>
         protected virtual TimeSpan GetAge(DateTime time, T item) => TimeSpan.Zero;
-
-        /// <summary>
-        /// Update the tracked symbol list with potential new symbols
-        /// </summary>
-        /// <param name="symbols"></param>
-        protected void UpdateSymbolsList(IEnumerable<SharedSymbol> symbols)
-        {
-            lock (_symbolLock)
-            {
-                foreach (var symbol in symbols.Distinct())
-                {
-                    if (!_symbols.Any(x => x.TradingMode == symbol.TradingMode && x.BaseAsset == symbol.BaseAsset && x.QuoteAsset == symbol.QuoteAsset))
-                    {
-                        _symbols.Add(symbol);
-                        _logger.LogDebug("Adding {BaseAsset}/{QuoteAsset} to symbol tracking list", symbol.BaseAsset, symbol.QuoteAsset);
-                    }
-                }
-            }
-        }
-
+        
         /// <summary>
         /// Handle an update
         /// </summary>
@@ -374,8 +349,7 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
                             toRemove.Add(item);
                             _logger.LogWarning("Ignoring {DataType} update for {Key}, no SharedSymbol set", DataType, GetKey(item));
                         }
-                        else if (_onlyTrackProvidedSymbols
-                            && !_symbols.Any(y => y.TradingMode == symbolModel.SharedSymbol!.TradingMode && y.BaseAsset == symbolModel.SharedSymbol.BaseAsset && y.QuoteAsset == symbolModel.SharedSymbol.QuoteAsset))
+                        else if (!_symbolTracker.ShouldProcess(symbolModel.SharedSymbol))
                         {
                             toRemove ??= new List<T>();
                             toRemove.Add(item);
@@ -386,8 +360,7 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
                 if (toRemove != null)
                     @event = @event.Except(toRemove).ToArray();
 
-                if (!_onlyTrackProvidedSymbols)
-                    UpdateSymbolsList(@event.OfType<SharedSymbolModel>().Select(x => x.SharedSymbol!));
+                _symbolTracker.UpdateTrackedSymbols(@event.OfType<SharedSymbolModel>().Select(x => x.SharedSymbol!));
             }
 
             // Update local store

CryptoExchange.Net/Trackers/UserData/Objects/UserDataSymbolTracker.cs

@@ -0,0 +1,85 @@
+using CryptoExchange.Net.SharedApis;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace CryptoExchange.Net.Trackers.UserData.Objects
+{
+    /// <summary>
+    /// Tracker for symbols used in UserDataTracker
+    /// </summary>
+    public class UserDataSymbolTracker
+    {
+        private readonly ILogger _logger;
+        private readonly List<SharedSymbol> _trackedSymbols;
+        private readonly bool _onlyTrackProvidedSymbols;
+        private readonly object _symbolLock = new object();
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public UserDataSymbolTracker(ILogger logger, UserDataTrackerConfig config)
+        {
+            _logger = logger;
+            _trackedSymbols = config.TrackedSymbols?.ToList() ?? [];
+            _onlyTrackProvidedSymbols = config.OnlyTrackProvidedSymbols;
+        }
+
+        /// <summary>
+        /// Get currently tracked symbols
+        /// </summary>
+        /// <returns></returns>
+        public IEnumerable<SharedSymbol> GetTrackedSymbols()
+        {
+            lock (_symbolLock)            
+                return _trackedSymbols.ToList();            
+        }
+
+        /// <summary>
+        /// Check whether a symbol is in the tracked symbols list and should be processed
+        /// </summary>
+        public bool ShouldProcess(SharedSymbol symbol)
+        {
+            if (!_onlyTrackProvidedSymbols)
+                return true;
+
+            return _trackedSymbols.Any(y => y.TradingMode == symbol!.TradingMode && y.BaseAsset == symbol.BaseAsset && y.QuoteAsset == symbol.QuoteAsset);
+        }
+
+        /// <summary>
+        /// Update the tracked symbol list with potential new symbols
+        /// </summary>
+        public void UpdateTrackedSymbols(IEnumerable<SharedSymbol> symbols, bool addByUser = false)
+        {
+            if (!addByUser && _onlyTrackProvidedSymbols)
+                return;
+
+            lock (_symbolLock)
+            {
+                foreach (var symbol in symbols.Distinct())
+                {
+                    if (!_trackedSymbols.Any(x => x.TradingMode == symbol.TradingMode && x.BaseAsset == symbol.BaseAsset && x.QuoteAsset == symbol.QuoteAsset))
+                    {
+                        _trackedSymbols.Add(symbol);
+                        _logger.LogDebug("Adding {TradingMode}.{BaseAsset}/{QuoteAsset} to symbol tracking list", symbol.TradingMode, symbol.BaseAsset, symbol.QuoteAsset);
+                    }
+                }
+            }
+        }
+
+        /// <summary>
+        /// Remove a symbol from the list
+        /// </summary>
+        public void RemoveTrackedSymbol(SharedSymbol symbol)
+        {
+            lock (_symbolLock)
+            {
+                var symbolToRemove = _trackedSymbols.SingleOrDefault(x => x.TradingMode == symbol.TradingMode && x.BaseAsset == symbol.BaseAsset && x.QuoteAsset == symbol.QuoteAsset);
+                if (symbolToRemove != null)
+                    _trackedSymbols.Remove(symbolToRemove);
+            }
+        }
+    }
+}

CryptoExchange.Net/Trackers/UserData/UserDataTracker.cs

@@ -1,4 +1,5 @@
 using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.SharedApis;
 using CryptoExchange.Net.Trackers.UserData.ItemTrackers;
 using CryptoExchange.Net.Trackers.UserData.Objects;
 using Microsoft.Extensions.Logging;
@@ -33,6 +34,11 @@ namespace CryptoExchange.Net.Trackers.UserData
         /// </summary>
         protected abstract UserDataItemTracker[] DataTrackers { get; }
 
+        /// <summary>
+        /// Symbol tracker
+        /// </summary>
+        protected internal UserDataSymbolTracker SymbolTracker { get; }
+
         /// <inheritdoc />
         public string? UserIdentifier { get; }
 
@@ -51,6 +57,11 @@ namespace CryptoExchange.Net.Trackers.UserData
         /// </summary>
         public bool Connected => DataTrackers.All(x => x.Connected);
 
+        /// <summary>
+        /// Currently tracked symbols
+        /// </summary>
+        public IEnumerable<SharedSymbol> TrackedSymbols => SymbolTracker.GetTrackedSymbols();
+
         /// <summary>
         /// ctor
         /// </summary>
@@ -65,6 +76,7 @@ namespace CryptoExchange.Net.Trackers.UserData
 
             _logger = logger;
 
+            SymbolTracker = new UserDataSymbolTracker(logger, config);
             Exchange = exchange;
             UserIdentifier = userIdentifier;
         }

CryptoExchange.Net/Trackers/UserData/UserFuturesDataTracker.cs

@@ -77,21 +77,21 @@ namespace CryptoExchange.Net.Trackers.UserData
 
             var trackers = new List<UserDataItemTracker>();
 
-            var balanceTracker = new BalanceTracker(logger, balanceRestClient, balanceSocketClient, accountType ?? SharedAccountType.PerpetualLinearFutures, config.BalancesConfig, exchangeParameters);
+            var balanceTracker = new BalanceTracker(logger, SymbolTracker, balanceRestClient, balanceSocketClient, accountType ?? SharedAccountType.PerpetualLinearFutures, config.BalancesConfig, exchangeParameters);
             Balances = balanceTracker;
             trackers.Add(balanceTracker);
 
-            var orderTracker = new FuturesOrderTracker(logger, futuresOrderRestClient, futuresOrderSocketClient, config.OrdersConfig, config.TrackedSymbols, config.OnlyTrackProvidedSymbols, exchangeParameters);
+            var orderTracker = new FuturesOrderTracker(logger, SymbolTracker, futuresOrderRestClient, futuresOrderSocketClient, config.OrdersConfig, config.TrackedSymbols, config.OnlyTrackProvidedSymbols, exchangeParameters);
             Orders = orderTracker;
             trackers.Add(orderTracker);
 
-            var positionTracker = new PositionTracker(logger, futuresOrderRestClient, positionSocketClient, config.PositionConfig, config.TrackedSymbols, config.OnlyTrackProvidedSymbols, WebsocketPositionUpdatesAreFullSnapshots, exchangeParameters);
+            var positionTracker = new PositionTracker(logger, SymbolTracker, futuresOrderRestClient, positionSocketClient, config.PositionConfig, config.TrackedSymbols, config.OnlyTrackProvidedSymbols, WebsocketPositionUpdatesAreFullSnapshots, exchangeParameters);
             Positions = positionTracker;
             trackers.Add(positionTracker);
 
             if (config.TrackTrades)
             {
-                var tradeTracker = new FuturesUserTradeTracker(logger, futuresOrderRestClient, userTradeSocketClient, config.UserTradesConfig, config.TrackedSymbols, config.OnlyTrackProvidedSymbols, exchangeParameters);
+                var tradeTracker = new FuturesUserTradeTracker(logger, SymbolTracker, futuresOrderRestClient, userTradeSocketClient, config.UserTradesConfig, config.TrackedSymbols, config.OnlyTrackProvidedSymbols, exchangeParameters);
                 Trades = tradeTracker;
                 trackers.Add(tradeTracker);
 
@@ -154,5 +154,30 @@ namespace CryptoExchange.Net.Trackers.UserData
                 interval = result ? TimeSpan.FromMinutes(30) : TimeSpan.FromMinutes(5);
             }
         }
+
+        /// <summary>
+        /// Add symbols to the list of symbols for which data is being tracked
+        /// </summary>
+        /// <param name="symbols">Symbols to add</param>
+        public void AddTrackedSymbolsAsync(IEnumerable<SharedSymbol> symbols)
+        {
+            if (symbols.Any(x => x.TradingMode == TradingMode.Spot))
+                throw new ArgumentException("Spot symbol not allowed in futures tracker", nameof(symbols));
+
+            SymbolTracker.UpdateTrackedSymbols(symbols, true);
+        }
+
+        /// <summary>
+        /// Remove a symbol from the list of symbols for which data is being tracked. 
+        /// Note that the symbol will be added again if new data for that symbol is received, unless the OnlyTrackProvidedSymbols option has been set to true.
+        /// </summary>
+        /// <param name="symbol">Symbol to remove</param>
+        public void RemoveTrackedSymbolAsync(SharedSymbol symbol)
+        {
+            SymbolTracker.RemoveTrackedSymbol(symbol);
+
+            ((FuturesOrderTracker)Orders).ClearDataForSymbol(symbol);
+            ((FuturesUserTradeTracker?)Trades)?.ClearDataForSymbol(symbol);
+        }
     }
 }

CryptoExchange.Net/Trackers/UserData/UserSpotDataTracker.cs

@@ -53,17 +53,17 @@ namespace CryptoExchange.Net.Trackers.UserData
 
             var trackers = new List<UserDataItemTracker>();
 
-            var balanceTracker = new BalanceTracker(logger, balanceRestClient, balanceSocketClient, SharedAccountType.Spot, config.BalancesConfig, exchangeParameters);
+            var balanceTracker = new BalanceTracker(logger, SymbolTracker, balanceRestClient, balanceSocketClient, SharedAccountType.Spot, config.BalancesConfig, exchangeParameters);
             Balances = balanceTracker;
             trackers.Add(balanceTracker);
 
-            var orderTracker = new SpotOrderTracker(logger, spotOrderRestClient, spotOrderSocketClient, config.OrdersConfig, config.TrackedSymbols, config.OnlyTrackProvidedSymbols, exchangeParameters);
+            var orderTracker = new SpotOrderTracker(logger, SymbolTracker, spotOrderRestClient, spotOrderSocketClient, config.OrdersConfig, config.TrackedSymbols, config.OnlyTrackProvidedSymbols, exchangeParameters);
             Orders = orderTracker;
             trackers.Add(orderTracker);
 
             if (config.TrackTrades)
             {
-                var tradeTracker = new SpotUserTradeTracker(logger, spotOrderRestClient, userTradeSocketClient, config.UserTradesConfig, config.TrackedSymbols, config.OnlyTrackProvidedSymbols, exchangeParameters);
+                var tradeTracker = new SpotUserTradeTracker(logger, SymbolTracker, spotOrderRestClient, userTradeSocketClient, config.UserTradesConfig, config.TrackedSymbols, config.OnlyTrackProvidedSymbols, exchangeParameters);
                 Trades = tradeTracker;
                 trackers.Add(tradeTracker);
 
@@ -127,5 +127,30 @@ namespace CryptoExchange.Net.Trackers.UserData
                 interval = result ? TimeSpan.FromMinutes(30) : TimeSpan.FromMinutes(5);
             }
         }
+
+        /// <summary>
+        /// Add symbols to the list of symbols for which data is being tracked
+        /// </summary>
+        /// <param name="symbols">Symbols to add</param>
+        public void AddTrackedSymbolsAsync(IEnumerable<SharedSymbol> symbols)
+        {
+            if (symbols.Any(x => x.TradingMode != TradingMode.Spot))
+                throw new ArgumentException("Futures symbol not allowed in spot tracker", nameof(symbols));
+
+            SymbolTracker.UpdateTrackedSymbols(symbols, true);
+        }
+
+        /// <summary>
+        /// Remove a symbol from the list of symbols for which data is being tracked. Also removes stored data for that symbol.
+        /// Note that the symbol will be added again if new data for that symbol is received, unless the OnlyTrackProvidedSymbols option has been set to true.
+        /// </summary>
+        /// <param name="symbol">Symbol to remove</param>
+        public void RemoveTrackedSymbolAsync(SharedSymbol symbol)
+        {
+            SymbolTracker.RemoveTrackedSymbol(symbol);
+
+            ((SpotOrderTracker)Orders).ClearDataForSymbol(symbol);
+            ((SpotUserTradeTracker?)Trades)?.ClearDataForSymbol(symbol);
+        }
     }
 }

README.md

@@ -67,6 +67,16 @@ Make a one time donation in a crypto currency of your choice. If you prefer to d
 Alternatively, sponsor me on Github using [Github Sponsors](https://github.com/sponsors/JKorf). 
 
 ## Release notes
+* Version 10.6.0 - 16 Feb 2026
+    * Updated symbol tracking logic on UserDataTracker, now is per UserDataTracker instead of per topic
+    * Added check for startTime filter for polling being to close to current time which can cause issues if time isn't in sync with server
+    * Added AddTrackedSymbolsAsync and RemoveTrackedSymbolAsync methods to UserDataTracker
+    * Added check SymbolOrderBook is still alive when trying to add updates to prevent unnoticed growing in the background when subscription isn't closed while book is
+
+* Version 10.5.4 - 12 Feb 2026
+    * Fixed type check ExchangeParameters GetValue
+    * Fixed bug in polling time filter for UserDataTracker item
+
 * Version 10.5.3 - 11 Feb 2026
     * Fixed orders getting incorrectly set to canceled state for UserDataTracker spot and futures orders
     * Added check EnumConverter to detect undefined int value parsing