gex.live has two halves. The terminal measures where SPX options dealers are positioned, every second, from the tape. The Lab is the half that asks the uncomfortable question: does any of that predict anything?
What it is
A browser-side conveyor with three stages and a credit meter.
Compile. You describe a rule in plain text — "short the first touch of the put wall when net gamma is below the 20th percentile" — and the compiler turns it into a deterministic rule over the archive's fields: flip, walls, hold band, gamma percentile, DEX/VEX/vanna/charm per strike, time of day. Compiling is free. If the text is ambiguous the compiler says which part, instead of guessing.
Backtest. The rule runs against the full session archive — 1,000+ finished SPX days, every one of them public at gex.live/sessions — with a fixed out-of-sample split. One credit per job; a job that fails refunds itself.
