Added function CopyRates. Implemented Backtesting

MtApi/MqlRates.cs

@@ -0,0 +1,22 @@
+using System;
+
+namespace MtApi
+{
+    public class MqlRates
+    {
+        public int MtTime { get; set; }
+
+        public DateTime Time
+        {
+            get { return MtApiTimeConverter.ConvertFromMtTime(MtTime); }
+        }
+
+        public double Open { get; set; }
+        public double High { get; set; }
+        public double Low { get; set; }
+        public double Close { get; set; }
+        public long TickVolume { get; set; }
+        public int Spread { get; set; }
+        public long RealVolume { get; set; }
+    }
+}