bin/Custom/Indicators/SentinelLaguerreFilter_v1_0_0.cs
| Family | Indicators |
| Version | 1.0.0 |
| Size | 230 lines |
| Scope | public — ships in sentinel-suite |
| Class | SentinelLaguerreFilter_v1_0_0 |
| Namespace | NinjaTrader.NinjaScript.Indicators.Sentinel.Smoothers |
| Documented by | no doc tracks this artifact |
Rendered from the published copy in
sentinel-suite/src/, not the author’s private tree — so this page describes the file you actually have.
Sentinel Laguerre Filter — Ehlers 4-element Laguerre (Sentinel smoother building block) | Version v1.0.0
File: SentinelLaguerreFilter_v1_0_0.cs | namespace …Indicators.Sentinel.Smoothers | display "Sentinel LaguerreFilter"
⚠ NO ORDERS · NO STATE SEAM — a read-only SMOOTHER building block, not a Council voter. It draws a
smoothed line + a Sentinel glass card; it publishes nothing (a moving average has no verdict).
PROVENANCE / LICENSE: CLEAN-ROOM. The algorithm (John Ehlers' 4-element Laguerre polynomial IIR filter)
was IDENTIFIED from a GPL-3.0 LizardIndicators source (amaLaguerreFilter.cs), but NO GPL code was used —
this is reimplemented FRESH from the canonical public formula (Ehlers, "Time Warp Without Space Travel"),
a mathematical method which is not copyrightable. No third-party code, variable names, or structure copied.
ASSUMPTIONS: the GPL source exposed only a Period and DERIVED gamma from it (γ = 1 − 2/(1.9 + 0.1·Period)).
Per the canonical Ehlers form (and this task's spec) the Sentinel version instead exposes the damping
factor Gamma DIRECTLY as the parameter (0..1, default 0.8) — higher gamma = smoother/laggier. Early bars
are seeded from the input value.
CHANGELOG
v1.0.0 (2026-07-12) — clean-room Ehlers 4-element Laguerre filter + Sentinel plumbing (naming law,
glass card, label remover). Member of …Indicators.Sentinel.Smoothers.