A LONG-SHORT, single-instrument SWING reversion on XRPUSDT.BINANCE (USD-M perp, DAILY bars) that trades the multi-day OVERREACTION reversal — a behavioral anomaly distinct from every reversion that died this session. The dead cases were CONTINUOUS oscillator/band fades that catch falling knives: ADA RSI-2 (2h), LINK Keltner-overshoot (4h) — both entered the moment price was extended and bled via inverted reward:risk. This instead is an EVENT-driven fade with three confirmations that must ALL hold before entry: (1) an extreme 3–5 day CUMULATIVE move (|z| ≥ 2 vs its rolling distribution) — a genuine overreaction, not a small wiggle; (2) a CLIMAX-volume bar (volume ≫ average) marking capitulation/blowoff, not a steady trend; (3) a REVERSAL bar (the most recent day closes back toward its open, against the move) — evidence the overreaction is already turning. Only then fade it. XRP is chosen deliberately: it is the most news-/headline-driven major (regulatory rulings, listing/delisting shocks), so its price routinely SPIKES on sentiment and retraces 5–15% over the following days — the textbook overreaction the strategy harvests, and one that is hard to arbitrage away (event timing + episodic). The tight continuation stop (thesis invalidated if the extreme extends) gives structurally POSITIVE reward:risk. This is NOT intraday reversion (holds days), NOT a continuous band/oscillator fade (dead), NOT a rank/rotation basket (L12/L24), NOT carry/options/liquidation/funding-directional. Pure OHLCV, data-safe; 3 core parameters (cumulative-move lookback, z threshold, volume multiple).