diff --git a/MtApi5/Mt5CommandType.cs b/MtApi5/Mt5CommandType.cs
index 3ffd8dbc..38aeed5c 100755
--- a/MtApi5/Mt5CommandType.cs
+++ b/MtApi5/Mt5CommandType.cs
@@ -101,6 +101,7 @@ namespace MtApi5
         //CTrade
         PositionClose                       = 64,
         PositionOpen                        = 65,
+        PositionModify                      = 6066,
         //PositionOpenWithResult              = 1065,
 
         //Backtesting
diff --git a/MtApi5/MtApi5Client.cs b/MtApi5/MtApi5Client.cs
index bbf578fc..a3f02434 100755
--- a/MtApi5/MtApi5Client.cs
+++ b/MtApi5/MtApi5Client.cs
@@ -547,6 +547,20 @@ namespace MtApi5
             return SendCommand<bool>(Mt5CommandType.PositionClose, commandParameters);
         }
 
+        /// <summary>
+        /// Modifies existing position
+        /// </summary>
+        /// <param name="ticket">>Ticket of the position</param>
+        /// <param name="sl">Stop loss</param>
+        /// <param name="tp">Take profit</param>
+        /// <returns></returns>
+        public bool PositionModify(ulong ticket, double sl, double tp)
+        {
+            var commandParameters = new ArrayList { ticket, sl,tp };
+
+            return SendCommand<bool>(Mt5CommandType.PositionModify, commandParameters);
+        }
+
         ///<summary>
         ///Closes a position with the specified ticket.
         ///</summary>
diff --git a/mq5/MtApi5.mq5 b/mq5/MtApi5.mq5
index 6f8f7d4b..f5d8c1de 100644
--- a/mq5/MtApi5.mq5
+++ b/mq5/MtApi5.mq5
@@ -552,6 +552,9 @@ int executeCommand()
 //   case 1065: //PositionOpenWithResult
 //      Execute_PositionOpen(true);
 //   break;   
+   case 6066: //PositionModify
+      Execute_PositionModify();
+   break;
    case 66: //BacktestingReady
       Execute_BacktestingReady();
    break;
@@ -3255,6 +3258,41 @@ void Execute_MarketBookRelease()
    }
 }
 
+void Execute_PositionModify()
+{
+   ulong ticket;
+   double sl;
+   double tp;
+
+   if (!getULongValue(ExpertHandle, 0, ticket, _error))
+   {
+      PrintParamError("PositionModify", "ticket", _error);
+      sendErrorResponse(ExpertHandle, -1, _error, _response_error);
+      return;
+   }
+   if (!getDoubleValue(ExpertHandle, 1, sl, _error))
+   {
+      PrintParamError("PositionModify", "sl", _error);
+      sendErrorResponse(ExpertHandle, -1, _error, _response_error);
+      return;
+   }
+   if (!getDoubleValue(ExpertHandle, 2, tp, _error))
+   {
+      PrintParamError("PositionModify", "tp", _error);
+      sendErrorResponse(ExpertHandle, -1, _error, _response_error);
+      return;
+   }
+
+   CTrade trade;
+   bool ok = trade.PositionModify(ticket,sl,tp);
+   Print("command PositionModify: result = ", ok);
+
+    if (!sendBooleanResponse(ExpertHandle, ok, _response_error))
+    {
+      PrintResponseError("PositionModify", _response_error);
+    }
+}
+
 void Execute_PositionOpen(bool isTradeResultRequired)
 {
    string symbol;