A long-only, single-instrument, single-timeframe strategy on ADAUSDT.BINANCE 4H bars (the most-reliably-fresh bar type per the persistent audit_stale pattern). Implements a NEW MECHANISM CLASS not yet tried in the portfolio: RETURNS-AUTOCORRELATION SIGN-FLIP as the primary regime-transition signal. The mechanism: compute the lag-1 autocorrelation of log returns over the last 30 bars. When this autocorrelation FLIPS from negative (mean-reverting/chop regime) to positive (trending regime) AND the current bar closes bullishly AND price is above the long-term trend filter, enter long. The signal captures the precise moment when the market transitions out of chop and into trend — earlier than any moving-average crossover (which lags by half the SMA period) and structurally distinct from any breakout strategy (which requires price-level breach). Critically distinct from every existing pipeline mechanism on ADA 4H: (a) NOT a Donchian breakout (uses statistical autocorrelation, not channel breach); (b) NOT a volume signal (uses return correlation, not transaction volume); (c) NOT bar-shape geometry (uses return-sequence statistics across 30 bars); (d) NOT a Z-score (uses CORRELATION, not standardized magnitude); (e) NOT channel-width expansion (uses temporal dependence of returns, not range geometry). Mechanism is academically grounded in financial econometrics: positive return autocorrelation indicates trending regimes (LeBaron 1992 'Persistence of the Dow Jones index'; Lo-MacKinlay 1988 variance-ratio tests); applied to crypto by Urquhart 2016 'The inefficiency of Bitcoin' which documents alternating autocorrelation regimes in crypto markets.