A long-only, single-instrument BINANCE_SPOT strategy on ETHUSDT 4H bars that uses the NR4 (narrow-range-4) volatility-contraction pattern as an entry trigger, gated by a long-term uptrend filter. NR4 is a Toby Crabel (1990) price-action observation: when a bar's true range is narrower than each of the prior 3 bars, the market is in unusually tight equilibrium, and the subsequent breakout of that bar's high or low tends to expand directionally. This is volatility-regime mechanism — distinct from the classical-indicator failure class (MACD, OBV, SAR, Heikin-Ashi all empirically refuted on ADA 4H), distinct from volume-z mean-reversion (already in pipeline as ADAVolumeSpikeMeanReversionLong), distinct from Bollinger band-width squeeze (band-based, not bar-range-based), and distinct from the Keltner failure (which lacked a trend filter — this strategy has one). Spot venue chosen because: (a) BINANCE_SPOT is critically under-quota at 6.1% vs 15% target while BINANCE futures is at 87.2% vs 40% cap; (b) spot's long-only constraint matches crypto's documented directional asymmetry; (c) BtcSpotDrawdownAccumulationLong confirms ETH/BTC spot bars are testable. Long-only-only because short-only directional has been empirically refuted on crypto majors.