diff --git a/MT5Connector/MT5Connector.cpp b/MT5Connector/MT5Connector.cpp
index 78d279f8..130cbc77 100755
--- a/MT5Connector/MT5Connector.cpp
+++ b/MT5Connector/MT5Connector.cpp
@@ -51,9 +51,15 @@ public struct CMqlBookInfo
 
 void convertSystemString(wchar_t* dest, String^ src)
 {
-    pin_ptr<const wchar_t> wch = PtrToStringChars(src);
-    memcpy(dest, wch, wcslen(wch) * sizeof(wchar_t));
-    dest[wcslen(wch)] = '\0';
+    if (src != nullptr) {
+        pin_ptr<const wchar_t> wch = PtrToStringChars(src);
+        memcpy(dest, wch, wcsnlen(wch, 1000) * sizeof(wchar_t));
+        dest[wcsnlen(wch, 1000)] = L'\0';
+    }
+    else
+    {
+        dest[0] = L'\0';
+    }
 }
 
 #define _DLLAPI extern "C" __declspec(dllexport)
@@ -278,7 +284,7 @@ _DLLAPI int _stdcall getStringValue(int expertHandle, int paramIndex, wchar_t* r
 _DLLAPI int _stdcall getULongValue(int expertHandle, int paramIndex, unsigned __int64* res, wchar_t* err)
 {
     return Execute<int>([&expertHandle, &paramIndex, res]() {
-        *res = (unsigned long)MtAdapter::GetInstance()->GetCommandParameter(expertHandle, paramIndex);
+        *res = (unsigned __int64)MtAdapter::GetInstance()->GetCommandParameter(expertHandle, paramIndex);
         return 1;
     }, err, 0);
 }
@@ -286,7 +292,7 @@ _DLLAPI int _stdcall getULongValue(int expertHandle, int paramIndex, unsigned __
 _DLLAPI int _stdcall getLongValue(int expertHandle, int paramIndex, __int64* res, wchar_t* err)
 {
     return Execute<int>([&expertHandle, &paramIndex, res]() {
-        *res = (long)MtAdapter::GetInstance()->GetCommandParameter(expertHandle, paramIndex);
+        *res = (__int64)MtAdapter::GetInstance()->GetCommandParameter(expertHandle, paramIndex);
         return 1;
     }, err, 0);
 }
@@ -306,4 +312,4 @@ _DLLAPI int _stdcall getUIntValue(int expertHandle, int paramIndex, unsigned int
         *res = (unsigned int)MtAdapter::GetInstance()->GetCommandParameter(expertHandle, paramIndex);
         return 1;
     }, err, 0);
-}
\ No newline at end of file
+}
diff --git a/MTApiService/MtMqlTradeRequest.cs b/MTApiService/MtMqlTradeRequest.cs
index 7e3037d3..873422dd 100755
--- a/MTApiService/MtMqlTradeRequest.cs
+++ b/MTApiService/MtMqlTradeRequest.cs
@@ -9,9 +9,9 @@ namespace MTApiService
         [DataMember]
         public int Action { get; set; }
         [DataMember]
-        public uint Magic { get; set; }
+        public ulong Magic { get; set; }
         [DataMember]
-        public uint Order { get; set; }
+        public ulong Order { get; set; }
         [DataMember]
         public string Symbol { get; set; }
         [DataMember]
@@ -25,7 +25,7 @@ namespace MTApiService
         [DataMember]
         public double Tp { get; set; }
         [DataMember]
-        public uint Deviation { get; set; }
+        public ulong Deviation { get; set; }
         [DataMember]
         public int Type { get; set; }
         [DataMember]
@@ -36,5 +36,9 @@ namespace MTApiService
         public DateTime Expiration { get; set; }
         [DataMember]
         public string Comment { get; set; }
+        [DataMember]
+        public ulong Position { get; set; }
+        [DataMember]
+        public ulong PositionBy { get; set; }
     }
 }
diff --git a/MtApi5/MtConverters.cs b/MtApi5/MtConverters.cs
index 73d355ee..e1e47336 100755
--- a/MtApi5/MtConverters.cs
+++ b/MtApi5/MtConverters.cs
@@ -149,7 +149,7 @@ namespace MtApi5
 
             return new ArrayList { (int)request.Action, request.Magic, request.Order, request.Symbol, request.Volume
                 , request.Price, request.Stoplimit, request.Sl, request.Tp, request.Deviation, (int)request.Type
-                , (int)request.Type_filling, (int)request.Type_time, exp, request.Comment };
+                , (int)request.Type_filling, (int)request.Type_time, exp, request.Comment, request.Position, request.PositionBy };
         }
 
         #endregion