A LONG-ONLY, MONTHLY-rebalanced SPOT rotation over four deep-history majors on BINANCE_SPOT — BTCUSDT, ETHUSDT, SOLUSDT, BNBUSDT — plus a CASH (USDT) sleeve. It deliberately targets the single defect that killed EVERY long-only basket-momentum sibling this session (Vol-Scaled 15-name +500%→75% DD, Low-Skew rotation 76% DD, Low-Vol rotation): they are ALWAYS INVESTED in crypto beta, so a bull-only backtest hides a >50% bear drawdown that hard-abandons at L19. The fix is a classic Antonacci dual-momentum construction the deployed 8-major relative-strength winner does NOT have: RELATIVE momentum picks which major to hold, but ABSOLUTE momentum decides whether to hold ANYTHING — if the strongest major's own 3-month return is negative (a market-wide downtrend), the strategy exits entirely to STABLECOIN. That stablecoin defense is the new, drawdown-solving signal input (a regime gate, not a re-weighting of relative strength — so it is not the L24 duplicate). It also fills two of the most under-represented buckets in the book at once: BINANCE_SPOT venue (11.4%) and the macro/monthly horizon (0.6% — the single rarest). No leverage (spot CASH account), so it structurally cannot blow up. This is NOT the deployed USD-M always-invested rotation (different venue, single-name concentration, and a cash-defense exit), NOT a dollar-neutral rank basket (L12), NOT carry/options/liquidation/funding-directional. Data-safe pure OHLCV; 2 core parameters (momentum lookback, number of names held = 1).