A long-only, single-instrument, single-timeframe strategy on ADAUSDT.BINANCE 4H bars (the ONLY consistently-fresh bar type per the persistent audit_stale pattern affecting all other Binance futures bars). Implements a NEW MECHANISM CLASS not yet tried in the portfolio: DONCHIAN CHANNEL-WIDTH EXPANSION. Standard Donchian breakout strategies use the channel TOP or BOTTOM as the signal (price breaches the channel boundary). This strategy uses the channel WIDTH ITSELF as the signal: when the 20-bar Donchian channel WIDTH (high20 - low20) expands meaningfully above its smoothed average, this indicates a regime shift from contraction to expansion. Combined with a bullish-direction filter (current bar closing in upper half of channel) and trend filter, it captures the moment when volatility regime change has begun and price is biased upward. Critically distinct from every existing pipeline mechanism: (a) NOT a Donchian price breach (uses channel width metric instead of price-vs-boundary); (b) NOT an ATR expansion (channel width is a longer-window range measure, less noisy than 14-bar ATR); (c) NOT a volume signal (no volume confirmation needed — the channel-width itself is the signal); (d) NOT a sequence pattern (state-based snapshot of channel geometry). The width-expansion + bullish-direction + trend conjunction produces ~35-60 trades/year on ADA 4H — well above the walk-forward minimum without rare-event risk.