Replaying the Fed cut hunt, tick by tick

The replay engine reconstructs a market's whole life — every fill, every wallet — so we can score signals against history instead of vibes. A full Fed-cut market packs into about 40MB of compressed state.

That lets us ask: would this heuristic have barked early enough? Loudly enough? Or would it have cried wolf? The fox learns offline so you don't have to.