A minimal long-only single-instrument mean-reversion strategy on SUIUSDT perpetual futures using 4-hour bars and ONLY OHLCV data (no funding, no L/S ratios, no liquidations, no pairs) to keep verification simple and deterministic. The hypothesis: SUI is a high-beta altcoin (avg 4H true range ~2-3%) that exhibits frequent intraday flush-and-recover patterns — panic selling drives price to a new N-bar low, but if that same bar closes bullishly (close > open) it signals absorption by buyers and a high-probability tactical bounce. The strategy waits for two simultaneous conditions on a closed 4H bar: (1) the bar's low prints a new 20-bar low, AND (2) the same bar closes green. It then enters long at the next bar's open with a tight ATR-buffered stop and a 1.5R fixed target, plus an 18-bar (3-day) time stop. Holding period is short (median ~6-12 bars), per-trade move target is ~2-3% which comfortably exceeds the ~0.10% round-trip futures fee. Trade frequency expected ~6-10 setups per month on SUI 4H — sparse enough to avoid fee drag, frequent enough for statistical significance over a 12-month backtest. Three parameters total (lookback=20, target_R=1.5, max_bars=18) — minimal overfitting surface area.