Donchian Breakout
Turtle Trading 20-period channel breakout. SHORT showed PF 1.27 (bull) / 1.06 (bear) in the original 2026-04 backtest, but failed a fresh out-of-sample regime-robustness re-test on 2026-06-28 (bear-beta artifact). Backtest is reproducible; the live directional edge is not.
1.27
Gross profit / gross loss ratio
Overview
The Donchian channel goes back to Richard Donchian, the futures pioneer who popularized N-period breakout rules decades before they became famous — the 1980s Turtle Trading experiment taught Richard Dennis’s novices a Donchian-style breakout, not the other way around. It enters when price breaks above or below the 20-period channel — a signal that a new trend may be establishing.
In the original 2026-04 backtest the SHORT side appeared profitable in both bull and bear samples. A fresh out-of-sample re-test on 2026-06-28 — same product engine, 18-cell sweep with a 5-axis adversarial kill — found this regime-robustness did not hold: the apparent edge was a bear-beta artifact, not a directional skill that survives unseen data. The backtest numbers below are reproducible, but we no longer present this as a live directional edge.
How It Works
- Channel calculation — highest high and lowest low over the past 20 bars (look-ahead safe: uses bars up to but not including the signal bar)
- LONG signal — current close breaks above the 20-bar high (upward momentum)
- SHORT signal — current close breaks below the 20-bar low (downward momentum)
- Entry — at the open of the next bar after the break
- Exit — TP 10% / SL 8%
Why It Works (Thesis)
The 20-period channel captures significant price movements that break out of consolidation zones. When price violates a multi-week high or low, it often signals the beginning of a directional move rather than random noise. The SHORT side looked stronger in the original sample because crypto assets frequently exhibit sharp, fast sell-offs — channel breaks to the downside tend to have stronger follow-through than upside breaks in a market prone to liquidation cascades.
That thesis is plausible, but the fresh OOS re-test (2026-06-28) showed the measured SHORT profit was driven by a falling market (short positions making money simply because price went down) rather than by a regime-independent breakout edge. Strip out that bear-beta and the standalone edge does not survive — so treat the thesis as unconfirmed.
Results
| Market regime | Profit factor (SHORT) |
|---|---|
| Bull market | 1.27 |
| Bear market | 1.06 |
These are the original 2026-04 backtest numbers and are reproducible. They are not evidence of robustness: a fresh out-of-sample re-test on 2026-06-28 failed regime-robustness, attributing the result to bear-beta rather than a regime-independent edge.
Default Parameters
| Parameter | Value |
|---|---|
| Channel period | 20 bars |
| Exit period | 10 bars |
| Stop loss | 8% |
| Take profit | 10% |
Caveats
- Failed fresh out-of-sample regime-robustness (2026-06-28). The earlier “profitable in both regimes” claim did not survive re-testing — the edge read as bear-beta, not a directional skill. Status downgraded from verified to testing for this reason, then subsequently killed.
- Lower profit factor in bear markets (1.06) — thin edge that would likely disappear under transaction costs in high-frequency trading.
- LONG direction not separately validated.
- Classic trend-following: suffers during choppy, range-bound markets.
- Not live-tracked on OKX. Backtest only — “verified” here means the backtest is reproducible, not that the live directional edge is confirmed.
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