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lib/reversals/swings/Swings.md
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# SWINGS: Swing High/Low Detection
| Property | Value |
| ---------------- | -------------------------------- |
| **Category** | Reversal |
| **Inputs** | OHLCV bar (TBar) |
| **Parameters** | `lookback` (default DefaultLookback) |
| **Outputs** | Single series (Swings) |
| **Output range** | Varies (see docs) |
| **Warmup** | 1 bar |
### TL;DR
- Swing High/Low detection identifies local price extremes using a configurable lookback window.
- Parameterized by `lookback` (default defaultlookback).
- Output range: Varies (see docs).
- Requires 1 bar of warmup before first valid output (IsHot = true).
- Validated against TA-Lib, Skender, and Tulip reference implementations where available.
> "The market tells you where it turned. You just have to listen long enough to be sure it actually meant it."
Swing High/Low detection identifies local price extremes using a configurable lookback window. A Swing High marks a bar whose high strictly exceeds the highs of all bars within the lookback window on each side. A Swing Low marks a bar whose low is strictly less than all corresponding lows. The lookback parameter controls sensitivity: larger lookback windows require more confirmation and produce fewer, more significant signals. This generalizes Williams' fixed five-bar Fractals into a flexible structural analysis tool.