A LONG-SHORT, SINGLE-INSTRUMENT directional TREND-momentum strategy on SPY.USEQ (S&P 500 ETF), deliberately built on the ONE structure this factory has actually validated to a ~2.0 Sharpe — the dual-timeframe momentum confluence template (fast + slow trend must AGREE, flat on disagreement, trailing-stop winners) — and ported to a genuinely different asset class and cost regime. The equity book's two prior mean-reversion/relative-value attempts (KO/PEP cointegration, XLF z-score fade) both died FLAT at zero Sharpe: those textbook edges are fully arbitraged even commission-free. The lesson from that pair of deaths, and from the factory's single success being directional momentum, is decisive — pursue a DIRECTIONAL trend edge, not a reversion/neutral one. Multi-week equity-index trend (time-series momentum) is one of the most robustly documented directional premia (Moskowitz-Ooi-Pedersen TSMOM; Faber GTAA; the managed-futures literature), and it is CLEANER on a broad index than on any single crypto alt because index-level trends are driven by slow macro/flow regimes rather than fast reflexive leverage. This differs from every equity strategy already in the pipeline: it is NOT calendar/event (turn-of-month, pre-FOMC), NOT a sector pair (XLK/XLU beta-regime), NOT volatility-scaled sizing (QQQ vol-regime) — it is a pure price-trend confluence on the broad index. It uses SPY specifically (the deepest history, since 1993, and the most institutionally-trended index) on Daily primary + Weekly confirm bars, giving 30+ years across multiple bull/bear cycles for a robust walk-forward and holdout. It is always-engaged except when the two timeframes disagree (so no structural zero-trade gap), long-short (filling the under-represented long_short bucket), and only 3 free parameters to resist overfitting. FEE ARITHMETIC: a captured multi-week trend leg on SPY runs ~3-10%; even with a ~40% win rate and ATR-trailed exits the average trade clears well above 0.5%, versus a ~0.04% commission-free round-trip = >10x the effective cost floor and far above the 0.15% viability bar. Turnover is low (~10-30 trades/year), so fee drag is negligible — the opposite of the sub-fee reversion mechanisms that dominate the graveyard.