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/cycles/ht_dcphase/HtDcphase.Tests.cs

@@ -139,8 +139,8 @@ public class HtDcphaseTests
         // First update (new bar)
         var result1 = ht.Update(new TValue(now.AddMinutes(70), 105), isNew: true);
 
-        // Same bar update
-        var result2 = ht.Update(new TValue(now.AddMinutes(70), 106), isNew: false);
+        // Same bar update with the same price — must yield identical result
+        var result2 = ht.Update(new TValue(now.AddMinutes(70), 105), isNew: false);
 
         Assert.Equal(result1.Value, result2.Value);
     }

lib/cycles/ht_dcphase/HtDcphase.Validation.Tests.cs

@@ -92,4 +92,32 @@ public sealed class HtDcphaseValidationTests : IDisposable
         var q = new HtDcphase();
         Assert.Equal(talibLookback, q.WarmupPeriod);
     }
+
+    [Fact]
+    public void HtDcphase_Correction_Recomputes()
+    {
+        var ind = new HtDcphase();
+        var t0 = new DateTime(946_684_800_000_000_0L, DateTimeKind.Utc);
+
+        // Build state well past warmup
+        for (int i = 0; i < 100; i++)
+        {
+            ind.Update(new TValue(t0.AddMinutes(i),
+                100.0 + 10.0 * Math.Sin(2.0 * Math.PI * i / 20.0)), isNew: true);
+        }
+
+        // Anchor bar
+        var anchorTime = t0.AddMinutes(100);
+        const double anchorPrice = 105.5;
+        ind.Update(new TValue(anchorTime, anchorPrice), isNew: true);
+        double anchorResult = ind.Last.Value;
+
+        // Correction with a dramatically different price — recompute must yield different result
+        ind.Update(new TValue(anchorTime, anchorPrice * 10.0), isNew: false);
+        Assert.NotEqual(anchorResult, ind.Last.Value);
+
+        // Correction back to original price — must exactly restore original result
+        ind.Update(new TValue(anchorTime, anchorPrice), isNew: false);
+        Assert.Equal(anchorResult, ind.Last.Value, 1e-9);
+    }
 }

lib/cycles/ht_dcphase/HtDcphase.cs

@@ -217,12 +217,10 @@ public sealed class HtDcphase : AbstractBase
         }
         else
         {
-            // Same-bar update: restore previous state and return cached result from Last
             _state = _p_state;
             Array.Copy(_p_circBuffer, _circBuffer, CIRC_BUFFER_SIZE);
             Array.Copy(_p_smoothPrice, _smoothPrice, SMOOTH_PRICE_SIZE);
             Array.Copy(_p_priceHistory, _priceHistory, PRICE_HISTORY_SIZE);
-            return Last.Value;
         }
 
         var s = _state;

lib/cycles/ht_dcphase/ht_dcphase.pine

@@ -1,4 +1,4 @@
-// The MIT License (MIT)
+// Licensed under the Apache License, Version 2.0
 // © mihakralj
 //@version=6
 indicator("Ehlers Hilbert Transform Dominant Cycle Phase (HT_DCPHASE)", "HT_DCPHASE", overlay=false)