Single instrument, single leg, pure OHLCV, event-triggered trade on the OKX USDT perpetual swap ADAUSDT.OKX, using 1-HOUR bars (history on OKX runs from 2020-03). The trigger is a 1H CLOSE above the highest HIGH of the prior 240 1H bars (10 days), which enters LONG, or a close below the lowest LOW of the prior 240 bars, which enters SHORT. The position exits on a fixed 12-hour clock. The book is FLAT whenever no breakout clock is running: about 394 trades x 12h over ~55,000 hours, so ~9% time in market and ~91% flat. No regime gate, no supplementary feed, no ranking (L130). Pre-study (point-in-time, run by the research lead on the catalog's ADAUSDT.OKX 1H bars, 2020-05 to 2026-09, one event per 24h): n=394 events (~62/yr). Mean signed forward log return was +0.33% at 6h, +0.61% at 12h (t=2.5, hit 0.53), +0.57% at 24h, +0.70% at 36h and +0.78% at 48h. The per-hour curve reaches its first peak on a t-stat basis at 12h, which sets the clock (L166). Net of a 0.11% round trip, the 12h clock gives mean +0.50%/trade and PF 1.35. Years 2020/21/22/25/26 are positive and 2023/24 slightly negative (-0.16%, -0.18%/trade). Long side +0.73% (n=210), short side +0.24% (n=184). The same rule on BTCUSDT.OKX gave +0.22% at 12h and +0.43% at 24h (t=2.1), the same sign and weaker, which supports a mechanism rather than an ADA artefact. SELECTION DISCLOSURE (L122): this cell was chosen from a scan of 5 event mechanisms (6h/24h tail continuation, 72h breakout, 72h breakout after vol compression, 10-day breakout) x 2 symbols (ADA, BTC; the only liquid OKX 1H series with multi-year history in the catalog) x 5 clocks = 50 cells. The best cell's t of 2.5 is therefore NOT significant after that multiplicity, and deflation should treat it as a best-of-50. The venue choice (OKX) is driven by the corpus quota (OKX 0.2% of experiments) and by OKX having 6+ years of 1H ADA history. It is not a claimed venue edge.