diff --git a/src/TALib.NETCore/Function.cs b/src/TALib.NETCore/Function.cs
index 9232a9b..81d5bc6 100644
--- a/src/TALib.NETCore/Function.cs
+++ b/src/TALib.NETCore/Function.cs
@@ -47,22 +47,20 @@ public int Lookback(params int[] options)
             var optInParameters = method.GetParameters().Where(pi => pi.Name.StartsWith(OptInPrefix)).ToList();
             var paramsArray = new object[optInParameters.Count];
             Array.Fill(paramsArray, Type.Missing);
-            if (options.Length == optInParameters.Count)
+
+            var defOptInParameters = Options.Select(NormalizeOptionalParameter).ToList();
+            for (int i = 0, paramsArrayIndex = 0; i < defOptInParameters.Count; i++)
             {
-                var defOptInParameters = Options.Select(NormalizeOptionalParameter).ToList();
-                for (int i = 0, paramsArrayIndex = 0; i < defOptInParameters.Count; i++)
+                var optInParameter = optInParameters.SingleOrDefault(p => p.Name == defOptInParameters[i]);
+                if (optInParameter != null)
                 {
-                    var optInParameter = optInParameters.SingleOrDefault(p => p.Name == defOptInParameters[i]);
-                    if (optInParameter != null)
+                    if (optInParameter.ParameterType.IsEnum && optInParameter.ParameterType.IsEnumDefined(options[i]))
                     {
-                        if (optInParameter.ParameterType.IsEnum && optInParameter.ParameterType.IsEnumDefined(options[i]))
-                        {
-                            paramsArray[paramsArrayIndex++] = Enum.ToObject(optInParameter.ParameterType, options[i]);
-                        }
-                        else
-                        {
-                            paramsArray[paramsArrayIndex++] = options[i];
-                        }
+                        paramsArray[paramsArrayIndex++] = Enum.ToObject(optInParameter.ParameterType, options[i]);
+                    }
+                    else
+                    {
+                        paramsArray[paramsArrayIndex++] = options[i];
                     }
                 }
             }
diff --git a/src/TALib.NETCore/TACore.cs b/src/TALib.NETCore/TACore.cs
index 3c4565e..3d22f7f 100644
--- a/src/TALib.NETCore/TACore.cs
+++ b/src/TALib.NETCore/TACore.cs
@@ -228,12 +228,9 @@ private static RetCode TA_INT_MACD(double[] inReal, int startIdx, int endIdx, do
         {
             outBegIdx = outNbElement = 0;
 
-            int tempInteger;
             if (optInSlowPeriod < optInFastPeriod)
             {
-                tempInteger = optInSlowPeriod;
-                optInSlowPeriod = optInFastPeriod;
-                optInFastPeriod = tempInteger;
+                (optInSlowPeriod, optInFastPeriod) = (optInFastPeriod, optInSlowPeriod);
             }
 
             double k1;
@@ -270,7 +267,7 @@ private static RetCode TA_INT_MACD(double[] inReal, int startIdx, int endIdx, do
                 return RetCode.Success;
             }
 
-            tempInteger = endIdx - startIdx + 1 + lookbackSignal;
+            var tempInteger = endIdx - startIdx + 1 + lookbackSignal;
             var fastEMABuffer = new double[tempInteger];
             var slowEMABuffer = new double[tempInteger];
 
@@ -324,12 +321,9 @@ private static RetCode TA_INT_MACD(decimal[] inReal, int startIdx, int endIdx, d
         {
             outBegIdx = outNbElement = 0;
 
-            int tempInteger;
             if (optInSlowPeriod < optInFastPeriod)
             {
-                tempInteger = optInSlowPeriod;
-                optInSlowPeriod = optInFastPeriod;
-                optInFastPeriod = tempInteger;
+                (optInSlowPeriod, optInFastPeriod) = (optInFastPeriod, optInSlowPeriod);
             }
 
             decimal k1;
@@ -366,7 +360,7 @@ private static RetCode TA_INT_MACD(decimal[] inReal, int startIdx, int endIdx, d
                 return RetCode.Success;
             }
 
-            tempInteger = endIdx - startIdx + 1 + lookbackSignal;
+            var tempInteger = endIdx - startIdx + 1 + lookbackSignal;
             var fastEMABuffer = new decimal[tempInteger];
             var slowEMABuffer = new decimal[tempInteger];
 
@@ -421,12 +415,9 @@ private static RetCode TA_INT_PO(double[] inReal, int startIdx, int endIdx, doub
         {
             outBegIdx = outNbElement = 0;
 
-            int tempInteger;
             if (optInSlowPeriod < optInFastPeriod)
             {
-                tempInteger = optInSlowPeriod;
-                optInSlowPeriod = optInFastPeriod;
-                optInFastPeriod = tempInteger;
+                (optInSlowPeriod, optInFastPeriod) = (optInFastPeriod, optInSlowPeriod);
             }
 
             RetCode retCode = Ma(inReal, startIdx, endIdx, tempBuffer, out var outBegIdx2, out _, optInMethod, optInFastPeriod);
@@ -441,8 +432,7 @@ private static RetCode TA_INT_PO(double[] inReal, int startIdx, int endIdx, doub
                 return retCode;
             }
 
-            tempInteger = outBegIdx1 - outBegIdx2;
-            for (int i = 0, j = tempInteger; i < outNbElement1; i++, j++)
+            for (int i = 0, j = outBegIdx1 - outBegIdx2; i < outNbElement1; i++, j++)
             {
                 if (doPercentageOutput)
                 {
@@ -467,12 +457,9 @@ private static RetCode TA_INT_PO(decimal[] inReal, int startIdx, int endIdx, dec
         {
             outBegIdx = outNbElement = 0;
 
-            int tempInteger;
             if (optInSlowPeriod < optInFastPeriod)
             {
-                tempInteger = optInSlowPeriod;
-                optInSlowPeriod = optInFastPeriod;
-                optInFastPeriod = tempInteger;
+                (optInSlowPeriod, optInFastPeriod) = (optInFastPeriod, optInSlowPeriod);
             }
 
             RetCode retCode = Ma(inReal, startIdx, endIdx, tempBuffer, out var outBegIdx2, out _, optInMethod, optInFastPeriod);
@@ -487,8 +474,7 @@ private static RetCode TA_INT_PO(decimal[] inReal, int startIdx, int endIdx, dec
                 return retCode;
             }
 
-            tempInteger = outBegIdx1 - outBegIdx2;
-            for (int i = 0, j = tempInteger; i < outNbElement1; i++, j++)
+            for (int i = 0, j = outBegIdx1 - outBegIdx2; i < outNbElement1; i++, j++)
             {
                 if (doPercentageOutput)
                 {
diff --git a/src/TALib.NETCore/TAFunc/TA_MacdExt.cs b/src/TALib.NETCore/TAFunc/TA_MacdExt.cs
index 2f16cf8..1b359c4 100644
--- a/src/TALib.NETCore/TAFunc/TA_MacdExt.cs
+++ b/src/TALib.NETCore/TAFunc/TA_MacdExt.cs
@@ -23,16 +23,10 @@ public static RetCode MacdExt(double[] inReal, int startIdx, int endIdx, double[
                 return RetCode.BadParam;
             }
 
-            int tempInteger;
             if (optInSlowPeriod < optInFastPeriod)
             {
-                tempInteger = optInSlowPeriod;
-                optInSlowPeriod = optInFastPeriod;
-                optInFastPeriod = tempInteger;
-
-                MAType tempMAType = optInSlowMAType;
-                optInSlowMAType = optInFastMAType;
-                optInFastMAType = tempMAType;
+                (optInSlowPeriod, optInFastPeriod) = (optInFastPeriod, optInSlowPeriod);
+                (optInSlowMAType, optInFastMAType) = (optInFastMAType, optInSlowMAType);
             }
 
             int lookbackSignal = MaLookback(optInSignalMAType, optInSignalPeriod);
@@ -48,7 +42,7 @@ public static RetCode MacdExt(double[] inReal, int startIdx, int endIdx, double[
                 return RetCode.Success;
             }
 
-            tempInteger = endIdx - startIdx + 1 + lookbackSignal;
+            var tempInteger = endIdx - startIdx + 1 + lookbackSignal;
             var fastMABuffer = new double[tempInteger];
             var slowMABuffer = new double[tempInteger];
 
@@ -115,16 +109,10 @@ public static RetCode MacdExt(decimal[] inReal, int startIdx, int endIdx, decima
                 return RetCode.BadParam;
             }
 
-            int tempInteger;
             if (optInSlowPeriod < optInFastPeriod)
             {
-                tempInteger = optInSlowPeriod;
-                optInSlowPeriod = optInFastPeriod;
-                optInFastPeriod = tempInteger;
-
-                MAType tempMAType = optInSlowMAType;
-                optInSlowMAType = optInFastMAType;
-                optInFastMAType = tempMAType;
+                (optInSlowPeriod, optInFastPeriod) = (optInFastPeriod, optInSlowPeriod);
+                (optInSlowMAType, optInFastMAType) = (optInFastMAType, optInSlowMAType);
             }
 
             int lookbackSignal = MaLookback(optInSignalMAType, optInSignalPeriod);
@@ -140,7 +128,7 @@ public static RetCode MacdExt(decimal[] inReal, int startIdx, int endIdx, decima
                 return RetCode.Success;
             }
 
-            tempInteger = endIdx - startIdx + 1 + lookbackSignal;
+            var tempInteger = endIdx - startIdx + 1 + lookbackSignal;
             var fastMABuffer = new decimal[tempInteger];
             var slowMABuffer = new decimal[tempInteger];
 
diff --git a/src/TALib.NETCore/TAFunc/TA_StochRsi.cs b/src/TALib.NETCore/TAFunc/TA_StochRsi.cs
index d047f92..19a9e8c 100644
--- a/src/TALib.NETCore/TAFunc/TA_StochRsi.cs
+++ b/src/TALib.NETCore/TAFunc/TA_StochRsi.cs
@@ -19,7 +19,7 @@ public static RetCode StochRsi(double[] inReal, int startIdx, int endIdx, double
                 return RetCode.BadParam;
             }
 
-            int lookbackSTOCHF = StochFLookback(optInFastDMAType);
+            int lookbackSTOCHF = StochFLookback(optInFastDMAType, optInFastKPeriod, optInFastDPeriod);
             int lookbackTotal = StochRsiLookback(optInFastDMAType, optInTimePeriod, optInFastKPeriod, optInFastDPeriod);
             if (startIdx < lookbackTotal)
             {
@@ -67,7 +67,7 @@ public static RetCode StochRsi(decimal[] inReal, int startIdx, int endIdx, decim
                 return RetCode.BadParam;
             }
 
-            int lookbackSTOCHF = StochFLookback(optInFastDMAType);
+            int lookbackSTOCHF = StochFLookback(optInFastDMAType, optInFastKPeriod, optInFastDPeriod);
             int lookbackTotal = StochRsiLookback(optInFastDMAType, optInTimePeriod, optInFastKPeriod, optInFastDPeriod);
             if (startIdx < lookbackTotal)
             {
diff --git a/src/TALib.NETCore/TAFunc/TA_Sub.cs b/src/TALib.NETCore/TAFunc/TA_Sub.cs
index 52dc836..9d29b07 100644
--- a/src/TALib.NETCore/TAFunc/TA_Sub.cs
+++ b/src/TALib.NETCore/TAFunc/TA_Sub.cs
@@ -47,7 +47,7 @@ public static RetCode Sub(decimal[] inReal0, decimal[] inReal1, int startIdx, in
             int outIdx = default;
             for (int i = startIdx; i <= endIdx; i++)
             {
-                outReal[outIdx++] = inReal0[i] * inReal1[i];
+                outReal[outIdx++] = inReal0[i] - inReal1[i];
             }
 
             outBegIdx = startIdx;
diff --git a/src/TALib.NETCore/TALib.NETCore.csproj b/src/TALib.NETCore/TALib.NETCore.csproj
index c900e8e..cd8cdcd 100644
--- a/src/TALib.NETCore/TALib.NETCore.csproj
+++ b/src/TALib.NETCore/TALib.NETCore.csproj
@@ -10,7 +10,7 @@
     <Copyright>TicTacTec LLC</Copyright>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
     <PackageProjectUrl>https://ta-lib.org</PackageProjectUrl>
-    <Version>0.4.3</Version>
+    <Version>0.4.4</Version>
     <RepositoryUrl>https://github.com/hmG3/TA-Lib.NETCore</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
     <PackageIcon>talib.png</PackageIcon>