A LONG-SHORT, single-instrument, pure-OHLCV momentum strategy on the BTCUSDT.BINANCE USD-M perpetual whose selectivity comes from momentum STRENGTH (magnitude relative to volatility), not from the sign-based dual/triple-timeframe confluence the meta-learner has banned (L38, zero survivors across all clones). Instead of requiring two timeframes to agree on direction, it computes a single-timeframe VOLATILITY-NORMALIZED momentum z-score = (return over a lookback) ÷ (rolling volatility of that return), and acts ONLY when that z-score is large in magnitude — i.e. a strong, high-signal-to-noise directional move, not a weak drift. This is a documented, materially different selectivity mechanism (magnitude gate vs timeframe-agreement gate): weak momentum signals (which dominate and add noise) are skipped, and only decisive moves — where the trend is strong relative to the market's own noise — are traded. The thesis: strong, vol-normalized momentum has better continuation odds and a cleaner reward profile than raw sign-based momentum, targeting the trade QUALITY (PF/Sharpe) that thin single-signal versions lacked. It stays on BTC (the one tradable instrument), single perp execution (dev-safe), pure OHLCV (well-covered, no coverage/no-trades risk), long-short (fills the 13.4% bucket vs 86.6% long-only), 4H cadence for a measurable sample, ATR trail. Deliberately 3-parameter (lookback, z-threshold, ATR trail) to resist overfit.