PropReplay

About PropReplay

The question every futures trader asks before paying for a prop firm evaluation: would my strategy actually survive their rules? PropReplay exists to answer it with data instead of guesswork.

What it does

Drop a TradingView "List of Trades" CSV (or any broker trade export) and PropReplay replays your trades, one by one, against the exact rule sets of major futures prop firms — Apex, Topstep, MyFundedFutures, Tradeify, Alpha Futures, and more. It simulates trailing and EOD drawdown, consistency rules, daily loss limits, payout gates, and contract scaling, then tells you:

whether the account survives or blows — across every possible starting date, not just one lucky run;
the largest contract size that stays inside the rules;
how long to the first payout, and which plan across firms fits your strategy best ("Rank all plans").

How the engine is verified

The browser engine is a line-by-line port of a Python reference implementation. On every page load it re-runs a self-test against pinned oracle numbers (898-trade and 958-trade reference backtests) — parse counts, verdicts, P&L, distribution and staging results must match to the dollar. If anything mismatches, the page says so instead of showing wrong numbers. The check result is visible at the bottom of the app.

Where the rule data comes from

Every firm profile is data — not code — with its source linked. Rules marked verified cite the firm's official help-center pages and carry the verification date; unverified drafts are labeled as such. Firms change rules constantly, so every profile has a one-click "Report a discrepancy" link — corrections with a screenshot of the official page get fixed fastest.

Honest limitations

PropReplay works on realized P&L from your backtest export. Intraday trailing uses MFE/MAE with a conservative assumption, contract scaling is linear (no slippage modeling), and two-strategy portfolios approximate overlapping intraday paths. It is a planning tool, not a guarantee — always confirm current rules with the firm before funding an account.

Who runs this

PropReplay is built and maintained by an independent futures trader who got tired of finding out about rule breaches after paying for evaluations. It runs entirely in your browser, is free to use, and may earn affiliate commissions from prop firm signups in the future — that will never change which firm the numbers recommend.

Contact

Feedback, bug reports, rule corrections: [email protected]