Issue #39: Added indicator functions on MQL side (MtApi MT5)

MtApi5/Mt5CommandType.cs

@@ -145,7 +145,7 @@
         iBullsPower                         = 98,
         iCCI                                = 99,
         iChaikin                            = 100,
-        iCustom                             = 101,
+        //iCustom                             = 101,
         iDEMA                               = 102,
         iDeMarker                           = 103,
         iEnvelopes                          = 104,

MtApi5/MtApi5Client.cs

@@ -1653,6 +1653,18 @@ namespace MtApi5
             return SendCommand<int>(Mt5CommandType.iAC, commandParameters);
         }
 
+        ///<summary>
+        ///The function returns the handle of the Accumulation/Distribution indicator.
+        ///</summary>
+        ///<param name="symbol">The symbol name of the security, the data of which should be used to calculate the indicator.</param>
+        ///<param name="period">The value of the period can be one of the ENUM_TIMEFRAMES enumeration values, 0 means the current timeframe.</param>
+        ///<param name="appliedVolume">The volume used. Can be any of ENUM_APPLIED_VOLUME values.</param>
+        public int iAD(string symbol, ENUM_TIMEFRAMES period, ENUM_APPLIED_VOLUME appliedVolume)
+        {
+            var commandParameters = new ArrayList { symbol, (int)period, (int)appliedVolume };
+            return SendCommand<int>(Mt5CommandType.iAD, commandParameters);
+        }
+
         ///<summary>
         ///The function returns the handle of the Average Directional Movement Index indicator.
         ///</summary>