A long-only, single-instrument, single-timeframe strategy on ADAUSDT.BINANCE 4H bars (the most-reliably-fresh bar type). Implements a NEW STRUCTURAL MECHANISM consistent with the analyst's explicit guidance: 'STRUCTURAL signals (sequence-based or range-statistics-based) are what works on liquid crypto — drop momentum-magnitude signals.' The mechanism: SEQUENTIAL LOW EQUALITY (double-low support test). Detect when a recent bar's low approximately matches a prior local low within a small ATR-fraction tolerance — this constitutes a 'support test' or 'double bottom' structural event. Combined with a bullish-close reclaim (current bar closes above the matched low level) and a long-term uptrend filter, the strategy captures the moment when sellers have failed to break support TWICE — a structural signal that buyers are defending the level. Critically distinct from every existing ADA 4H mechanism: (a) NOT Donchian breach (uses LOW-equality, not high-channel breach); (b) NOT bar geometry (uses MULTI-BAR low comparison, not single-bar shape); (c) NOT range outlier (uses low-LEVEL match, not range size); (d) NOT autocorrelation/z-score/cumulative return (no momentum-magnitude math — pure structural sequence); (e) NOT gap/sequential-HH (uses LOW-low matching, not high-high or open-gap); (f) NOT volume signal (no volume needed — structural price-level signal). Mechanism is RANGE-STATISTICS-BASED per analyst's explicit recommendation. Different from the abandoned 'failed-breakdown-reclaim' (PF 0.45 wrong-direction) because this requires LOW-EQUALITY (sellers TWICE failed at same level), not breakdown-then-reclaim (sellers succeeded once then reversed). The thesis is fundamentally different: 'support held twice' vs 'breakdown false-faked'.