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feat(oscillators): add DSO - Ehlers Deviation-Scaled Oscillator

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Implement DSO (TASC Oct 2018) with SSF 2-pole filter, RMS normalization,
and Fisher Transform (±0.99 clamp). Sealed class, O(1) streaming RMS via
RingBuffer, precomputed SSF coefficients.

New files: Dso.cs, Dso.Quantower.cs, Dso.md, dso.pine,
  Dso.Tests.cs (27), Dso.Validation.Tests.cs (7), Dso.Quantower.Tests.cs (11)

Updated: Exports.cs, _bridge.py, oscillators.py, SPEC.md,
  _sidebar.md, lib/_index.md, oscillators/_index.md,
  docs/indicators.md, docs/pinescript.md

All 19,565 tests pass, 0 warnings.
This commit is contained in:
Miha Kralj
2026-03-17 11:59:04 -07:00
parent 5fc6e27d8e
commit 7db48e2418
16 changed files with 1468 additions and 0 deletions
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python/src/Exports.cs
+10
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@@ -418,6 +418,16 @@ public static unsafe partial class Exports
catch { return StatusCodes.QTL_ERR_INTERNAL; }
}
// Dso: Pattern A (src, out, int period)
[UnmanagedCallersOnly(EntryPoint = "qtl_dso")]
public static int QtlDso(double* src, int n, double* dst, int period)
{
int v = Chk1(src, dst, n); if (v != 0) return v;
v = ChkPeriod(period); if (v != 0) return v;
try { Dso.Batch(Src(src, n), Dst(dst, n), period); return StatusCodes.QTL_OK; }
catch { return StatusCodes.QTL_ERR_INTERNAL; }
}
// Dymi: Pattern A (src, out, int p1..p5)
[UnmanagedCallersOnly(EntryPoint = "qtl_dymi")]
public static int QtlDymi(double* src, int n, double* dst, int p1, int p2, int p3, int p4, int p5)