The source EA trades the Percentage_Crossover_Channel. The midline ratchets: mid_t = close*(1-p) if close*(1-p) > mid_{t-1}; mid_t = close*(1+p) if close*(1+p) < mid_{t-1}; otherwise mid_t = mid_{t-1}. Upper = mid*(1+p), lower = mid*(1-p). DEFAULT mode is contrarian: buy when the low touches the lower border, sell when the high touches the upper border, always in the market, tested on EURUSD H1 for one year (unverified). The EA's own claims are ignored. I ran a point-in-time pandas pre-study on OKX USDT-swap 4H bars (ADA, DOT, LINK and AVAX, 2020-2026, 0.10% round trip). (1) The DEFAULT contrarian always-in mode loses money at every fixed width p in {2,4,6,10,15}% on all 4 coins, and at every vol-scaled width. Fade per-trade net ranges from -0.07% to -0.53%, annualised trade Sharpe from -0.26 to -1.17. That framing is falsified and is NOT proposed. (2) REVERSE mode turns the ratchet channel into a percent-reversal breakout: go long when close lifts the midline (close > upper border of the previous bar), go short when close pushes it down. In the pre-study, the only positive-expectancy region is a WIDE channel scaled to volatility, p = k * stdev(4h log returns, 180 bars) with k ≈ 6, i.e. a band of ~6-9%. Adding the source's midline-cross as an EXIT (flat when close crosses back through the midline against the position) is also positive there. Net results: ADA +1.23%/trade (133 trades, Sharpe 0.27), DOT +1.15% (123, 0.26), LINK +0.13% (132, 0.04), AVAX +11.5% (112, 0.61); mean hold ~9 days. Fixed-percent width (the source's literal 'Percent' input) is replaced by the vol-scaled width because one fixed % cannot fit coins whose vol differs 2x across regimes. Trading the 4 coins as independent sleeves (each 25% of equity, 1x) gives ~500 lifetime trades, which is enough sample, and stays under lesson L173's ~10-name cap. Venue: OKX (1.6% of corpus, under the >=5% quota). Direction is long-short (corpus is 84% long-only). None of these 4 instruments is BTC. CAVEAT stated up front: this is a trend/breakout mechanism, a crowded family, and the pre-study edge is thin and concentrated in AVAX. Priority is set low accordingly.