diff --git a/CryptoExchange.Net/Objects/Options.cs b/CryptoExchange.Net/Objects/Options.cs
index 525f1c8..156364f 100644
--- a/CryptoExchange.Net/Objects/Options.cs
+++ b/CryptoExchange.Net/Objects/Options.cs
@@ -26,8 +26,12 @@ namespace CryptoExchange.Net.Objects
     /// <summary>
     /// Base for order book options
     /// </summary>
-    public class OrderBookOptions: BaseOptions
+    public class OrderBookOptions : BaseOptions
     {
+        /// <summary>
+        /// Update event raising timeout in milliseconds (to limit it at high-liquidity order books)
+        /// </summary>
+        public int UpdateEventTimeout { get; }
         /// <summary>
         /// The name of the order book implementation
         /// </summary>
@@ -42,8 +46,10 @@ namespace CryptoExchange.Net.Objects
         /// </summary>
         /// <param name="name">The name of the order book implementation</param>
         /// <param name="sequencesAreConsecutive">Whether each update should have a consecutive id number. Used to identify and reconnect when numbers are skipped.</param>
-        public OrderBookOptions(string name, bool sequencesAreConsecutive)
+        /// <param name="updateInterval">Update event raising timeout in milliseconds (to limit it at high-liquidity order books)</param>
+        public OrderBookOptions(string name, bool sequencesAreConsecutive, int? updateInterval)
         {
+            UpdateEventTimeout = updateInterval ?? 1000;
             OrderBookName = name;
             SequenceNumbersAreConsecutive = sequencesAreConsecutive;
         }
@@ -52,7 +58,7 @@ namespace CryptoExchange.Net.Objects
     /// <summary>
     /// Base client options
     /// </summary>
-    public class ClientOptions: BaseOptions
+    public class ClientOptions : BaseOptions
     {
 
         /// <summary>
@@ -74,7 +80,7 @@ namespace CryptoExchange.Net.Objects
     /// <summary>
     /// Base for rest client options
     /// </summary>
-    public class RestClientOptions: ClientOptions
+    public class RestClientOptions : ClientOptions
     {
         /// <summary>
         /// List of rate limiters to use
@@ -96,7 +102,7 @@ namespace CryptoExchange.Net.Objects
         /// </summary>
         /// <typeparam name="T"></typeparam>
         /// <returns></returns>
-        public T Copy<T>() where T:RestClientOptions, new()
+        public T Copy<T>() where T : RestClientOptions, new()
         {
             var copy = new T
             {
@@ -119,7 +125,7 @@ namespace CryptoExchange.Net.Objects
     /// <summary>
     /// Base for socket client options
     /// </summary>
-    public class SocketClientOptions: ClientOptions
+    public class SocketClientOptions : ClientOptions
     {
         /// <summary>
         /// Whether or not the socket should automatically reconnect when losing connection
diff --git a/CryptoExchange.Net/OrderBook/SymbolOrderBook.cs b/CryptoExchange.Net/OrderBook/SymbolOrderBook.cs
index 5edd59d..2e5f2dc 100644
--- a/CryptoExchange.Net/OrderBook/SymbolOrderBook.cs
+++ b/CryptoExchange.Net/OrderBook/SymbolOrderBook.cs
@@ -13,7 +13,7 @@ namespace CryptoExchange.Net.OrderBook
     /// <summary>
     /// Base for order book implementations
     /// </summary>
-    public abstract class SymbolOrderBook: IDisposable
+    public abstract class SymbolOrderBook : IDisposable
     {
         /// <summary>
         /// The process buffer, used while syncing
@@ -27,6 +27,7 @@ namespace CryptoExchange.Net.OrderBook
         /// <summary>
         /// The bid list
         /// </summary>
+
         protected SortedList<decimal, OrderBookEntry> bids;
         private OrderBookStatus status;
         private UpdateSubscription subscription;
@@ -69,12 +70,19 @@ namespace CryptoExchange.Net.OrderBook
         /// <summary>
         /// Event when the state changes
         /// </summary>
-        public event Action<OrderBookStatus, OrderBookStatus> OnStatusChange;  
+        public event Action<OrderBookStatus, OrderBookStatus> OnStatusChange;
         /// <summary>
-        /// Event when orderbook was updated
-        /// </summary>
+        /// Event when orderbook was updated, but not more often then timeout setted in orderbook options (1000ms by default). Be careful! with small timeout it can generate a lot of events at high-liquidity order books 
+        /// </summary>    
         public event Action OnOrderBookUpdate;
         /// <summary>
+        /// Should be useful for low-liquidity order-books to monitor market activity
+        /// </summary>
+        public DateTime LastOrderBookUpdate;
+        private DateTime LastOrderBookUpdateEventTrigger;
+
+        private readonly int updateEventInterval;
+        /// <summary>
         /// The number of asks in the book
         /// </summary>
         public int AskCount { get; private set; }
@@ -141,6 +149,7 @@ namespace CryptoExchange.Net.OrderBook
             id = options.OrderBookName;
             processBuffer = new List<ProcessBufferEntry>();
             sequencesAreConsecutive = options.SequenceNumbersAreConsecutive;
+            updateEventInterval = options.UpdateEventTimeout;
             Symbol = symbol;
             Status = OrderBookStatus.Disconnected;
 
@@ -166,7 +175,7 @@ namespace CryptoExchange.Net.OrderBook
         {
             Status = OrderBookStatus.Connecting;
             var startResult = await DoStart().ConfigureAwait(false);
-            if(!startResult.Success)
+            if (!startResult.Success)
                 return new CallResult<bool>(false, startResult.Error);
 
             subscription = startResult.Data;
@@ -234,7 +243,7 @@ namespace CryptoExchange.Net.OrderBook
         /// </summary>
         /// <returns></returns>
         protected abstract Task<CallResult<bool>> DoResync();
-        
+
         /// <summary>
         /// Set the initial data for the order book
         /// </summary>
@@ -249,7 +258,7 @@ namespace CryptoExchange.Net.OrderBook
                     return;
 
                 asks.Clear();
-                foreach(var ask in askList)
+                foreach (var ask in askList)
                     asks.Add(ask.Price, new OrderBookEntry(ask.Price, ask.Quantity));
                 bids.Clear();
                 foreach (var bid in bidList)
@@ -262,7 +271,12 @@ namespace CryptoExchange.Net.OrderBook
 
                 CheckProcessBuffer();
                 bookSet = true;
-                OnOrderBookUpdate?.Invoke();
+                LastOrderBookUpdate = DateTime.UtcNow;
+                if ((LastOrderBookUpdate - LastOrderBookUpdateEventTrigger).TotalMilliseconds >= updateEventInterval)
+                {
+                    OnOrderBookUpdate?.Invoke();
+                    LastOrderBookUpdateEventTrigger = DateTime.UtcNow;
+                }
                 log.Write(LogVerbosity.Debug, $"{id} order book {Symbol} data set: {BidCount} bids, {AskCount} asks");
             }
         }
@@ -299,11 +313,16 @@ namespace CryptoExchange.Net.OrderBook
                 }
                 else
                 {
-                    foreach(var entry in entries)
+                    foreach (var entry in entries)
                         ProcessUpdate(entry.Type, entry.Entry);
                     LastSequenceNumber = lastSequenceNumber;
                     CheckProcessBuffer();
-                    OnOrderBookUpdate?.Invoke();
+                    LastOrderBookUpdate = DateTime.UtcNow;
+                    if ((LastOrderBookUpdate - LastOrderBookUpdateEventTrigger).TotalMilliseconds >= updateEventInterval)
+                    {
+                        OnOrderBookUpdate?.Invoke();
+                        LastOrderBookUpdateEventTrigger = DateTime.UtcNow;
+                    }
                     log.Write(LogVerbosity.Debug, $"{id} order book {Symbol} update: {entries.Count} entries processed");
                 }
             }
@@ -316,7 +335,7 @@ namespace CryptoExchange.Net.OrderBook
         {
             foreach (var bufferEntry in processBuffer.OrderBy(b => b.FirstSequence).ToList())
             {
-                if(bufferEntry.LastSequence < LastSequenceNumber)
+                if (bufferEntry.LastSequence < LastSequenceNumber)
                 {
                     processBuffer.Remove(bufferEntry);
                     continue;
@@ -325,7 +344,7 @@ namespace CryptoExchange.Net.OrderBook
                 if (bufferEntry.FirstSequence > LastSequenceNumber + 1)
                     break;
 
-                foreach(var entry in bufferEntry.Entries)
+                foreach (var entry in bufferEntry.Entries)
                     ProcessUpdate(entry.Type, entry.Entry);
                 processBuffer.Remove(bufferEntry);
                 LastSequenceNumber = bufferEntry.LastSequence;