diff --git a/MtApi/MtApiClient.cs b/MtApi/MtApiClient.cs
index 9860701a..37d2d0b7 100755
--- a/MtApi/MtApiClient.cs
+++ b/MtApi/MtApiClient.cs
@@ -2186,6 +2186,15 @@ namespace MtApi
 
         #endregion
 
+        #region Backtesting functions
+
+        public void UnlockTicks()
+        {
+            SendCommand<object>(MtCommandType.UnlockTicks, null);
+        }
+
+        #endregion
+
         #region Private Methods
         private MtClient Client
         {
diff --git a/MtApi/MtCommandType.cs b/MtApi/MtCommandType.cs
index d326fd2d..3b3b5492 100755
--- a/MtApi/MtCommandType.cs
+++ b/MtApi/MtCommandType.cs
@@ -227,6 +227,8 @@
         ObjectSet                           = 231,
         ObjectSetFiboDescription            = 232,
         ObjectSetText                       = 233,
-        ObjectType                          = 234
+        ObjectType                          = 234,
+
+        UnlockTicks                         = 235
     }
 }
diff --git a/mq4/MtApi.ex4 b/mq4/MtApi.ex4
index 87ad2277..a86bcfe2 100755
Binary files a/mq4/MtApi.ex4 and b/mq4/MtApi.ex4 differ
diff --git a/mq4/MtApi.mq4 b/mq4/MtApi.mq4
index 53dc9975..0a0eaef3 100755
Binary files a/mq4/MtApi.mq4 and b/mq4/MtApi.mq4 differ