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lib/trends_IIR/gdema/Gdema.md
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# GDEMA: Generalized Double Exponential Moving Average
# GDEMA: Generalized Double Exponential Moving Average
| Property | Value |
| ---------------- | -------------------------------- |
| **Category** | Trend (IIR MA) |
| **Inputs** | Source (close) |
| **Parameters** | `period` (default 10), `vfactor` (default 1.0) |
| **Outputs** | Single series (Gdema) |
| **Output range** | Tracks input |
| **Warmup** | `period` bars |
### TL;DR
- GDEMA extends the standard DEMA (Double Exponential Moving Average) with a tunable gain factor $v$ that controls the aggressiveness of lag compensa...
- Parameterized by `period` (default 10), `vfactor` (default 1.0).
- Output range: Tracks input.
- Requires `period` bars of warmup before first valid output (IsHot = true).
- Validated against TA-Lib, Skender, and Tulip reference implementations where available.
> "Patrick Mulloy created DEMA to cancel first-order lag. GDEMA adds a volume knob: turn it past 1 and you cancel more lag than Mulloy thought possible. Turn it to 0 and you are back to a plain EMA. The generalization is the point."