feat: add new indicators (Decay, Edecay, MinusDi, MinusDm, PlusDi, PlusDm, Maxindex, Minindex, Sarext) and update pine scripts, core libs, validation tests, and python bindings

lib/oscillators/squeeze/Squeeze.Validation.Tests.cs

@@ -215,4 +215,35 @@ public sealed class SqueezeValidationTests
         Assert.Equal(sqStream.Momentum, sqBatch.Momentum, precision: 8);
         Assert.Equal(sqStream.SqueezeOn, sqBatch.SqueezeOn);
     }
+
+    [Fact]
+    public void Squeeze_Correction_Recomputes()
+    {
+        var ind = new Squeeze(period: 20);
+        long t0 = TimeSpan.TicksPerSecond;
+
+        // Build state well past warmup (WarmupPeriod = 20)
+        for (int i = 0; i < 50; i++)
+        {
+            double p = 100.0 + i * 0.5;
+            ind.Update(new TBar(t0 + i * TimeSpan.TicksPerSecond, p, p + 1, p - 1, p, 1000), isNew: true);
+        }
+
+        // Anchor bar
+        long anchorTime = t0 + 50 * TimeSpan.TicksPerSecond;
+        var anchorBar = new TBar(anchorTime, 125.0, 126.0, 124.0, 125.0, 1000);
+        ind.Update(anchorBar, isNew: true);
+        double anchorMomentum = ind.Momentum;
+        bool anchorSqueezeOn = ind.SqueezeOn;
+
+        // Correction with dramatically different values — Momentum must change
+        var corruptBar = new TBar(anchorTime, 1250.0, 1260.0, 1240.0, 1250.0, 1000);
+        ind.Update(corruptBar, isNew: false);
+        Assert.NotEqual(anchorMomentum, ind.Momentum);
+
+        // Correction back to original — both outputs must restore exactly
+        ind.Update(anchorBar, isNew: false);
+        Assert.Equal(anchorMomentum, ind.Momentum, 1e-9);
+        Assert.Equal(anchorSqueezeOn, ind.SqueezeOn);
+    }
 }

lib/oscillators/squeeze/Squeeze.cs

@@ -369,6 +369,11 @@ public sealed class Squeeze : ITValuePublisher
         SqueezeOn = false;
     }
 
+    /// <summary>
+    /// Span-based batch Squeeze calculation. Populates both the momentum and squeeze-state output spans.
+    /// </summary>
+    /// <param name="momOut">Output span for Squeeze momentum values (linear regression of detrended price).</param>
+    /// <param name="sqOut">Output span for squeeze-state values (positive when Bollinger Bands are inside Keltner Channel).</param>
     public static void Batch(
         ReadOnlySpan<double> high,
         ReadOnlySpan<double> low,

lib/oscillators/squeeze/squeeze.pine

@@ -1,4 +1,4 @@
-// The MIT License (MIT)
+// Licensed under the Apache License, Version 2.0
 // © mihakralj
 //@version=6
 indicator("Squeeze Momentum (SQUEEZE)", "SQUEEZE", overlay=false)