A LONG-SHORT directional strategy on the BTCUSDT.BINANCE USD-M perpetual driven by a genuinely NEW, well-covered, NON-OPTIONS INFORMATION SOURCE — the perp BASIS (mark-vs-index premium, premium_index) — used as basis-MOMENTUM per the meta-learner's L38 mandate. It is deliberately CONTINUATION-aligned, not a fade: this session has shown every BTC contrarian/fade (liquidation, OI-divergence, DVOL-reversal, false-breakout, deleveraging, positioning-divergence) has no edge, while the momentum/trend direction is the only survivor — so a new-source signal traded WITH the flow is the untested, better-aligned angle. The signal: the RATE OF CHANGE of the perp premium is a direct, leading read of leveraged demand — a rising basis means aggressive leveraged BUYING is building (bullish pressure accumulating), a falling/negative basis means leveraged demand is draining or shorts are pressing (bearish). Trading the perp in the direction of the basis-momentum captures that leveraged-flow continuation. It is distinct from every prior idea: not price-only (basis is the primary signal), not a fade, not the dead OI/momentum CONFIRM (basis ROC is the primary directional driver, price only filters), not options (diversifying my four pending options ideas), and premium_index is well-covered on Binance (avoiding the taker-ratio/L-S coverage ceilings and DVOL history limits). It trades the liquid BTC perp (dev-safe, signal=execution instrument), single instrument, long-short (fills the 13.5% bucket), 4H cadence for a measurable ~100-200 trade sample, with an ATR trail to ride continuation. 3 parameters.