refactor: remove unused JMA power parameter from entire stack

lib/channels/jbands/Jbands.Tests.cs

@@ -635,7 +635,7 @@ public class JbandsTests
     {
         // Verify that middle band matches standalone JMA
         var jbands = new Jbands(14, 0);
-        var jma = new Jma(14, 0, 0.45);
+        var jma = new Jma(14, 0);
         var gbm = new GBM(startPrice: 100, mu: 0.01, sigma: 0.1, seed: 999);
 
         for (int i = 0; i < 200; i++)

lib/trends_IIR/jma/Jma.Tests.cs

@@ -32,11 +32,11 @@ public class JmaTests
         double[] wrongSizeOutput = new double[3];
 
         // Period must be > 0
-        Assert.Throws<ArgumentOutOfRangeException>(() => Jma.Batch(source.AsSpan(), output.AsSpan(), 0, 0, 1.0));
+        Assert.Throws<ArgumentOutOfRangeException>(() => Jma.Batch(source.AsSpan(), output.AsSpan(), 0, 0));
-        Assert.Throws<ArgumentOutOfRangeException>(() => Jma.Batch(source.AsSpan(), output.AsSpan(), -1, 0, 1.0));
+        Assert.Throws<ArgumentOutOfRangeException>(() => Jma.Batch(source.AsSpan(), output.AsSpan(), -1, 0));
 
         // Output must be same length as source
-        Assert.Throws<ArgumentException>(() => Jma.Batch(source.AsSpan(), wrongSizeOutput.AsSpan(), 3, 0, 1.0));
+        Assert.Throws<ArgumentException>(() => Jma.Batch(source.AsSpan(), wrongSizeOutput.AsSpan(), 3, 0));
     }
 
     [Fact]
@@ -235,8 +235,10 @@ public class JmaTests
     }
 
     [Fact]
-    public void Jma_Power_AffectsResult()
+    public void Jma_Power_RemovedFromApi()
     {
+        // Power parameter was removed — it was never used in calculation.
+        // Verify the 2-parameter Batch still works correctly.
         var series = new TSeries();
         var gbm = new GBM(startPrice: 100.0, mu: 0.02, sigma: 0.1, seed: 42);
         for (int i = 0; i < 100; i++)
@@ -245,14 +247,8 @@ public class JmaTests
             series.Add(bar.Time, bar.Close);
         }
 
-        var jmaPowerDefault = Jma.Batch(series, 10, power: 0.45);
+        var result = Jma.Batch(series, 10);
-        var jmaPower1 = Jma.Batch(series, 10, power: 1.0);
+        Assert.True(double.IsFinite(result.Last.Value));
-        var jmaPower2 = Jma.Batch(series, 10, power: 2.0);
-
-        // Power parameter is kept for API compatibility with Pine reference
-        // but does not affect output in this implementation
-        Assert.Equal(jmaPowerDefault.Last.Value, jmaPower1.Last.Value, 1e-10);
-        Assert.Equal(jmaPowerDefault.Last.Value, jmaPower2.Last.Value, 1e-10);
     }
 
     [Fact]

lib/trends_IIR/jma/Jma.cs

@@ -64,18 +64,13 @@ public sealed class Jma : AbstractBase
 
     public override bool IsHot => _state.Bars >= WarmupPeriod;
 
-    public Jma(int period, int phase = 0, double power = 0.45)
+    public Jma(int period, int phase = 0)
     {
         if (period < 1)
         {
             throw new ArgumentOutOfRangeException(nameof(period), "Period must be >= 1.");
         }
 
-        if (!double.IsFinite(power))
-        {
-            throw new ArgumentException("Power must be finite.", nameof(power));
-        }
-
         // --- Phase parameter: maps -100..100 -> 0.5..2.5 (Jurik convention) ---
         if (phase < -100)
         {
@@ -115,7 +110,7 @@ public sealed class Jma : AbstractBase
         WarmupPeriod = (int)Math.Ceiling(20.0 + 80.0 * Math.Pow(period, 0.36));
 
         _handler = Handle;
-        Name = $"Jma({period},{phase},{power})"; // power kept for signature compatibility (ignored in calculation)
+        Name = $"Jma({period},{phase})";
 
         _devBuffer = new RingBuffer(DevWindowSize);
         _volBuffer = new RingBuffer(VolWindowSize);
@@ -123,8 +118,8 @@ public sealed class Jma : AbstractBase
         Reset();
     }
 
-    public Jma(ITValuePublisher source, int period, int phase = 0, double power = 0.45)
+    public Jma(ITValuePublisher source, int period, int phase = 0)
-        : this(period, phase, power)
+        : this(period, phase)
     {
         _source = source;
         source.Pub += _handler;
@@ -358,9 +353,9 @@ public sealed class Jma : AbstractBase
         }
     }
 
-    public static TSeries Batch(TSeries source, int period, int phase = 0, double power = 0.45)
+    public static TSeries Batch(TSeries source, int period, int phase = 0)
     {
-        var jma = new Jma(period, phase, power);
+        var jma = new Jma(period, phase);
         return jma.Update(source);
     }
 
@@ -370,8 +365,7 @@ public sealed class Jma : AbstractBase
     public static void Batch(ReadOnlySpan<double> source,
                                  Span<double> output,
                                  int period,
-                                 int phase = 0,
+                                 int phase = 0)
-                                 double power = 0.45)
     {
         if (output.Length != source.Length)
         {
@@ -383,16 +377,16 @@ public sealed class Jma : AbstractBase
             return;
         }
 
-        var jma = new Jma(period, phase, power);
+        var jma = new Jma(period, phase);
         for (int i = 0; i < source.Length; i++)
         {
             output[i] = jma.Step(source[i], isNew: true);
         }
     }
 
-    public static (TSeries Results, Jma Indicator) Calculate(TSeries source, int period, int phase = 0, double power = 0.45)
+    public static (TSeries Results, Jma Indicator) Calculate(TSeries source, int period, int phase = 0)
     {
-        var indicator = new Jma(period, phase, power);
+        var indicator = new Jma(period, phase);
         TSeries results = indicator.Update(source);
         return (results, indicator);
     }

python/quantalib/_bridge.py

@@ -170,7 +170,7 @@ HAS_FRAMA = _bind("qtl_frama", [_dp, _dp, _ci, _ci])
 HAS_HOLT = _bind("qtl_holt", [_dp, _dp, _ci, _ci, _cd])
 HAS_HTIT = _bind("qtl_htit", [_dp, _dp, _ci])
 HAS_HWMA = _bind("qtl_hwma", [_dp, _dp, _ci, _ci])
-HAS_JMA = _bind("qtl_jma", [_dp, _dp, _ci, _ci, _ci, _cd])
+HAS_JMA = _bind("qtl_jma", [_dp, _dp, _ci, _ci, _ci])
 HAS_KAMA = _bind("qtl_kama", [_dp, _dp, _ci, _ci, _ci, _ci])
 HAS_LTMA = _bind("qtl_ltma", [_dp, _dp, _ci, _ci])
 HAS_MAMA = _bind("qtl_mama", [_dp, _dp, _cd, _ci, _cd, _dp])

python/quantalib/trends_iir.py

@@ -107,16 +107,15 @@ def hwma(close: object, period: int = 14, offset: int = 0, **kwargs) -> object:
     return _wrap(output, idx, f"HWMA_{period}", "trends_iir", offset)
 
 
-def jma(close: object, period: int = 14, phase: int = 0, power: float = 0.45, offset: int = 0, **kwargs) -> object:
+def jma(close: object, period: int = 14, phase: int = 0, offset: int = 0, **kwargs) -> object:
     """Jurik Moving Average."""
     period = int(period)
     phase = int(phase)
-    power = float(power)
     offset = int(offset)
     src, idx = _arr(close)
     n = len(src)
     output = _out(n)
-    _check(_lib.qtl_jma(_ptr(src), _ptr(output), n, period, phase, power))
+    _check(_lib.qtl_jma(_ptr(src), _ptr(output), n, period, phase))
     return _wrap(output, idx, f"JMA_{period}", "trends_iir", offset)
 
 

python/src/Exports.Generated.cs

@@ -1146,13 +1146,13 @@ public static unsafe partial class Exports
     }
 
     [UnmanagedCallersOnly(EntryPoint = "qtl_jma")]
-    public static int QtlJma(double* source, double* output, int n, int period, int phase, double power)
+    public static int QtlJma(double* source, double* output, int n, int period, int phase)
     {
         if (source == null || output == null) return StatusCodes.QTL_ERR_NULL_PTR;
         if (n <= 0) return StatusCodes.QTL_ERR_INVALID_LENGTH;
         try
         {
-            Jma.Batch(Src(source, n), Dst(output, n), period, phase, power);
+            Jma.Batch(Src(source, n), Dst(output, n), period, phase);
             return StatusCodes.QTL_OK;
         }
         catch { return StatusCodes.QTL_ERR_INTERNAL; }