Strategy replay
Polymarket Strategy Replay Data
Strategy replay is replay pointed at decisions: instead of replaying a market, you replay a decision rule across the recorded 250ms grid and score each instance by what the market actually did next. This page covers the replay corpus and its honest scope.
Figures measured as of 2026-09-24 on the published PolyOrderbooks archive.
The short answer
Merchants of decisions
Where a backtest prices fills, a strategy replay prices decisions: for each 250ms frame where the rule fires, the replay records the book state, the fill the rule would get, and the outcome that market eventually settled. The output is a per-decision dataset, not a single equity curve.
That per-decision record is the analytic difference: it lets a study decompose a strategy into its winning and losing decision contexts instead of judging the aggregate.
Corpus
What the replay corpus covers
The corpus is the resolved set of the archive — 118,251 resolved markets across eight coins and the sports families — each with its full 250ms history and outcome. A strategy run across that corpus is a study of ~every tradable instance the venue has printed.
The honest scope statement accompanies every replay: sample of markets, window, and the flag treatment are reported with the results, exactly as the methodology requires.
How to use
Using replay data
Run the rule against the books endpoint, store the per-decision rows, then aggregate by context — one-sided frames, bound-resting frames, reprint frames — to find where the edge actually comes from.
The archive ships the per-decision material (books, prices, metrics, tape, outcome), so a strategy replay never has to reconstruct a frame from a summary.
Honest
The honest framing
Replay data measures decisions in hindsight; it cannot invent the future. The honest use is calibration — how often the rule's context produced the outcome — and the honest ceiling is the reconstruction benchmark the replay family publishes.
FAQ
What is strategy replay data?
A per-decision record of a rule over the recorded grid — book state, resulting fill, and eventual outcome for every activation.
What corpus does it use?
The resolved archive: 118,251 markets with full 250ms history and outcomes.
What is replay good for?
Decomposing a strategy by decision context — finding where its edge sits (or leaks) frame by frame.