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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.
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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/SPEC.md
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@@ -652,6 +652,7 @@ packages = ["quantalib"]
| dpo | `Dpo` | A | period |
| dstoch | `Dstoch` | E (HLC) | period |
| dosc | `Dosc` | A | rsiPeriod, ema1Period, ema2Period, sigPeriod |
| dso | `Dso` | A | period |
| dymi | `Dymi` | A | basePeriod, shortPeriod, longPeriod... |
| er | `Er` | A | period |
| fisher | `Fisher` | A | period, alpha |