diff --git a/MtApi/MtApiClient.cs b/MtApi/MtApiClient.cs
index 388831db..09780b26 100755
--- a/MtApi/MtApiClient.cs
+++ b/MtApi/MtApiClient.cs
@@ -1137,7 +1137,7 @@ namespace MtApi
             return SendCommand<double>(ExecutorHandle, MtCommandType.iBearsPower, cmdParams);
         }
 
-        public double iBands(string symbol, int timeframe, int period, int deviation, int bandsShift, int appliedPrice, int mode, int shift)
+        public double iBands(string symbol, int timeframe, int period, double deviation, int bandsShift, int appliedPrice, int mode, int shift)
         {
             Dictionary<string, object> cmdParams = new() { { "Symbol", symbol },
                 { "Timeframe", timeframe }, { "Period", period },
@@ -1147,7 +1147,7 @@ namespace MtApi
             return SendCommand<double>(ExecutorHandle, MtCommandType.iBands, cmdParams);
         }
 
-        public double iBandsOnArray(double[] array, int total, int period, int deviation, int bandsShift, int mode, int shift)
+        public double iBandsOnArray(double[] array, int total, int period, double deviation, int bandsShift, int mode, int shift)
         {
             Dictionary<string, object> cmdParams = new() { { "Total", total },
                 { "Period", period }, { "Deviation", deviation },
diff --git a/mq4/MtApi.ex4 b/mq4/MtApi.ex4
index 89804d3b..9d1b3d0a 100755
Binary files a/mq4/MtApi.ex4 and b/mq4/MtApi.ex4 differ
diff --git a/mq4/MtApi.mq4 b/mq4/MtApi.mq4
index 165b66c1..08696492 100755
--- a/mq4/MtApi.mq4
+++ b/mq4/MtApi.mq4
@@ -2272,7 +2272,7 @@ string Execute_iBands()
    GET_STRING_JSON_VALUE(jo, "Symbol", symbol);
    GET_INT_JSON_VALUE(jo, "Timeframe", timeframe);
    GET_INT_JSON_VALUE(jo, "Period", period);
-   GET_INT_JSON_VALUE(jo, "Deviation", deviation);
+   GET_DOUBLE_JSON_VALUE(jo, "Deviation", deviation);
    GET_INT_JSON_VALUE(jo, "BandsShift", bands_shift);
    GET_INT_JSON_VALUE(jo, "AppliedPrice", applied_price);
    GET_INT_JSON_VALUE(jo, "Mode", mode);
@@ -2287,7 +2287,7 @@ string Execute_iBandsOnArray()
    GET_JSON_PAYLOAD(jo);
    GET_INT_JSON_VALUE(jo, "Total", total);
    GET_INT_JSON_VALUE(jo, "Period", period);
-   GET_INT_JSON_VALUE(jo, "Deviation", deviation);
+   GET_DOUBLE_JSON_VALUE(jo, "Deviation", deviation);
    GET_INT_JSON_VALUE(jo, "BandsShift", bands_shift);
    GET_INT_JSON_VALUE(jo, "Mode", mode);
    GET_INT_JSON_VALUE(jo, "Shift", shift);