ATR Breakout SHORT

Overview

ATR Breakout SHORT fires when the previous close breaks below an ATR-scaled band — the close from two bars back minus 2.0× ATR(14) — signalling a downside volatility expansion, with an EMA trend filter confirming downward bias. Unlike BB Squeeze which waits for compression first, this strategy catches the early momentum of a directional volatility burst.

Status: SHELVED (stand-down). This is the one conditional survivor of the 2026-06-28 fresh out-of-sample re-test: a genuine altcoin-short timing edge that beat brainless shorting across regimes and held up against costs and tail risk (36/40 coins). But a fine-grained walk-forward — finer than annual windows — exposed a structural −321% / 62% max drawdown in 2024-H1. An annual window hid that losing sub-regime. So it is not an all-weather edge and is unsuitable for unsupervised real-money trading: only consider it with a bull-market stand-down filter and a small position size. We mark it shelved, not verified, for exactly this reason.

How It Works

1. Band breakout — the previous close breaks below the lower ATR band (close from two bars back − 2.0× ATR(14))
2. Trend filter — EMA20 below EMA50 (previous bar) confirms downward bias
3. Entry — SHORT on the next bar’s open after the breakout signal
4. Exit — TP 10% / SL 3% / 48-bar (2-day) timeout
5. Risk — asymmetric: 1:3.3 R:R (3% risk, 10% reward)

Why It Works (Thesis)

ATR spikes in crypto typically mean one of two things: a genuine directional move, or a wick-spike that reverts. On a 1H timeframe with the 3% SL, you get stopped out quickly when it’s a wick. When it’s a real downward expansion — an altcoin breaks support, a leverage cascade starts — the 10% TP captures the bulk of the move.

The SHORT edge (not LONG) appears structural: in crypto, downward volatility expansions tend to be sharper and less frequently faded by new buyers in the first 2 hours. Upward expansions attract FOMO buyers that compress the follow-through. Unlike the other sweep presets, this one survived the 2026-06-28 adversarial kill — but only conditionally, because it bleeds badly in bull sub-regimes (see the 2024-H1 drawdown above).

Results (2-year backtest, IS/OOS split, measured 2026-05-04)

Metric	IS (May24–May25)	OOS (May25–May26)	Combined
Total trades	1,513	1,326	2,839
Win rate	~38%	~34%	35.9%
Profit factor	1.57	1.28	1.42
Coins profitable	48/50	36/50	—

Low win rate is by design — the 1:3.3 R:R means each win covers 3+ losses. The combined PF (1.42) is reproducible, but read the caveats: a finer walk-forward shows it is regime-dependent, not all-weather.

Caveats

• Conditional survivor, not deployable (2026-06-28). Finer-than-annual walk-forward exposed −321% / 62% MDD in 2024-H1. The strategy is real altcoin-short alpha in bear/choppy regimes but bleeds heavily in bull runs — unsuitable for unsupervised real-money trading. Shelved pending a bull-market stand-down filter; use small size only.
• OOS PF (1.28) is lower than IS (1.57) — some IS outperformance did not carry forward.
• Tight 3% SL generates frequent stop-outs. Requires accepting a ~64% loss rate.
• Not live-tracked. Backtest only.
• All LONG configurations remain unprofitable on OOS data.