A LONG-SHORT, single-instrument, pure-price momentum-confluence trend follower on BNBUSDT.BINANCE (USD-M perpetual), 4H primary bars with a 1D trend confirmation. It is a deliberate, evidence-driven re-application of the ONLY archetype that has survived this factory's full pipeline to paper: dual-timeframe momentum confluence long-short (promoted on ADAUSDT Sharpe 1.60 and BTCUSDT Sharpe 1.99). The mechanism takes a directional position ONLY when the fast (4H) momentum and the slow (1D) trend AGREE, and stands flat when they disagree. BNB is chosen precisely because it is NOT the over-mined BTC/ETH/SOL series and has an independent fundamental driver (exchange-token / BNB-chain flows), so its multi-day trend regime is not just another correlated copy of the majors' price path — yet it is deep enough in liquidity that market impact (the killer of the SOL/ETH dollar-neutral pairs trade) is negligible for single-instrument directional sizing. This is NOT the volume-confirmed variant (L91) and carries NO regime/efficiency/volatility gate bolted onto momentum (L92): the confluence of two horizons IS the mechanism, and it is the exact structure that already generalized across two distinct majors (ADA and BTC), which is the empirical warrant for a third liquid major.