New version merge

lib/averages/Hma.cs

@@ -0,0 +1,77 @@
+namespace QuanTAlib;
+
+public class Hma : AbstractBase
+{
+    private readonly int _period, _sqrtPeriod;
+    private readonly Convolution _wmaHalf, _wmaFull, _wmaFinal;
+
+    public Hma(int period)
+    {
+        if (period < 2)
+        {
+            throw new ArgumentException("Period must be greater than or equal to 2.", nameof(period));
+        }
+        _period = period;
+        _sqrtPeriod = (int)Math.Sqrt(period);
+        _wmaHalf = new Convolution(GenerateWmaKernel(period / 2));
+        _wmaFull = new Convolution(GenerateWmaKernel(period));
+        _wmaFinal = new Convolution(GenerateWmaKernel(_sqrtPeriod));
+        Name = "Hma";
+        WarmupPeriod = _period + _sqrtPeriod - 1;
+        Init();
+    }
+
+    public Hma(object source, int period) : this(period)
+    {
+        var pubEvent = source.GetType().GetEvent("Pub");
+        pubEvent?.AddEventHandler(source, new ValueSignal(Sub));
+    }
+
+    private static double[] GenerateWmaKernel(int period)
+    {
+        double[] kernel = new double[period];
+        double weightSum = period * (period + 1) / 2.0;
+
+        for (int i = 0; i < period; i++)
+        {
+            kernel[i] = (period - i) / weightSum;
+        }
+
+        return kernel;
+    }
+
+    private new void Init()
+    {
+        base.Init();
+        _wmaHalf.Init();
+        _wmaFull.Init();
+        _wmaFinal.Init();
+    }
+
+    protected override void ManageState(bool isNew)
+    {
+        if (isNew)
+        {
+            _lastValidValue = Input.Value;
+            _index++;
+        }
+    }
+
+    protected override double Calculation()
+    {
+        ManageState(Input.IsNew);
+
+        // Calculate WMA(n/2) and WMA(n)
+        double wmaHalfResult = _wmaHalf.Calc(Input).Value;
+        double wmaFullResult = _wmaFull.Calc(Input).Value;
+
+        // Calculate 2*WMA(n/2) - WMA(n)
+        double intermediateResult = 2 * wmaHalfResult - wmaFullResult;
+
+        // Calculate final WMA
+        double result = _wmaFinal.Calc(new TValue(Input.Time, intermediateResult, Input.IsNew)).Value;
+
+        IsHot = _index >= WarmupPeriod;
+        return result;
+    }
+}