diff --git a/CryptoExchange.Net.UnitTests/ExchangeHelpersTests.cs b/CryptoExchange.Net.UnitTests/ExchangeHelpersTests.cs
index 131a9f3..2fcdae0 100644
--- a/CryptoExchange.Net.UnitTests/ExchangeHelpersTests.cs
+++ b/CryptoExchange.Net.UnitTests/ExchangeHelpersTests.cs
@@ -32,6 +32,7 @@ namespace CryptoExchange.Net.UnitTests
         [TestCase(0.1, 1, 0.0001, RoundingType.Closest, 0.532, 0.532)]
         [TestCase(0.1, 1, 0.0001, RoundingType.Down, 0.5516592, 0.5516)]
         [TestCase(0.1, 1, 0.0001, RoundingType.Closest, 0.5516592, 0.5517)]
+        [TestCase(0, 1, 0.000000001, RoundingType.Closest, 0.0000097232, 0.000009723)]
         public void AdjustValueStepTests(decimal min, decimal max, decimal? step, RoundingType roundingType, decimal input, decimal expected)
         {
             var result = ExchangeHelpers.AdjustValueStep(min, max, step, roundingType, input);
diff --git a/CryptoExchange.Net/ExchangeHelpers.cs b/CryptoExchange.Net/ExchangeHelpers.cs
index 668821a..525db92 100644
--- a/CryptoExchange.Net/ExchangeHelpers.cs
+++ b/CryptoExchange.Net/ExchangeHelpers.cs
@@ -88,8 +88,6 @@ namespace CryptoExchange.Net
                     value -= offset;
                 else value += (step.Value - offset);
             }
-
-            value = RoundDown(value, 8);
                 
             return value.Normalize();
         }