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Miha Kralj
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lib/trends_FIR/nlma/Nlma.md
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# NLMA: Non-Lag Moving Average
# NLMA: Non-Lag Moving Average
| Property | Value |
| ---------------- | -------------------------------- |
| **Category** | Trend (FIR MA) |
| **Inputs** | Source (close) |
| **Parameters** | `period` (default 14) |
| **Outputs** | Single series (Nlma) |
| **Output range** | Tracks input |
| **Warmup** | 1 bar |
### TL;DR
- NLMA uses a two-phase damped cosine kernel with $5P - 1$ taps (where $P$ is the user period).
- Parameterized by `period` (default 14).
- Output range: Tracks input.
- Requires 1 bar of warmup before first valid output (IsHot = true).
- Validated against TA-Lib, Skender, and Tulip reference implementations where available.
> "Igorad at TrendLaboratory built a two-phase FIR kernel that uses five times more taps than the period parameter suggests. The extra taps carry negative weights that actively cancel group delay. Most 'non-lag' indicators are marketing. This one is signal processing."