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/qqe/Qqe.Validation.Tests.cs

@@ -241,4 +241,33 @@ public sealed class QqeValidationTests
         Assert.NotEqual(ind1.QqeValue, ind2.QqeValue);
         _output.WriteLine($"QQE(14,5,4.236)={ind1.QqeValue:F6}  QQE(7,3,2)={ind2.QqeValue:F6}");
     }
+
+    [Fact]
+    public void Qqe_Correction_Recomputes()
+    {
+        var ind = new Qqe();
+        var t0 = DateTime.MinValue;
+
+        // Build state well past warmup (WarmupPeriod ≈ 37)
+        for (int i = 0; i < 60; i++)
+        {
+            ind.Update(new TValue(t0.AddSeconds(i), 100.0 + i * 0.5));
+        }
+
+        // Anchor bar
+        var anchorTime = t0.AddSeconds(60);
+        const double anchorPrice = 130.0;
+        ind.Update(new TValue(anchorTime, anchorPrice), isNew: true);
+        double anchorQqe = ind.QqeValue;
+        double anchorSignal = ind.Signal;
+
+        // Use large downward spike (÷10) to move RSI away from ceiling
+        ind.Update(new TValue(anchorTime, anchorPrice / 10), isNew: false);
+        Assert.NotEqual(anchorQqe, ind.QqeValue);
+
+        // Correction back to original — both outputs must restore exactly
+        ind.Update(new TValue(anchorTime, anchorPrice), isNew: false);
+        Assert.Equal(anchorQqe, ind.QqeValue, 1e-9);
+        Assert.Equal(anchorSignal, ind.Signal, 1e-9);
+    }
 }

lib/oscillators/qqe/Qqe.cs

@@ -278,6 +278,10 @@ public sealed class Qqe : AbstractBase
     }
 
     /// <summary>Span-based batch calculation (QQE line only).</summary>
+    /// <remarks>
+    /// Computes only the QQE line (EMA-smoothed RSI). The dynamic trailing <see cref="Signal"/> line
+    /// is not available from this API; use <see cref="Update(TValue, bool)"/> streaming to access both outputs.
+    /// </remarks>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static void Batch(ReadOnlySpan<double> source, Span<double> output,
                              int rsiPeriod = DefaultRsiPeriod,

lib/oscillators/qqe/qqe.pine

@@ -1,4 +1,4 @@
-// The MIT License (MIT)
+// Licensed under the Apache License, Version 2.0
 // © mihakralj
 //@version=6
 indicator("Quantitative Qualitative Estimation (QQE)", "QQE", overlay=false)