The gap between the fleet's hit rate on UP calls and on DOWN calls in a period.
Up and down calls are graded identically, but they rarely score the same: in a drifting-up market UP calls get a tailwind and DOWN calls a headwind, and vice versa. The direction asymmetry is that gap, reported on every monthly accuracy report next to the fleet hit rate.
A large asymmetry is a warning about the headline number — a fleet that is 56% on UP and 44% on DOWN in a rising month has mostly measured the market's drift, not its own skill.
Related: Fleet hit rate · Always-long benchmark · Coin-flip edge
Full grading rules: methodology.
Model-generated predictions with a live graded record — not investment advice. 模型生成的预测，非投资建议。