How to test a strategy against prop firm rules before you pay for a challenge
Daily loss limits, maximum drawdown, profit targets, minimum trading days and consistency rules decide whether a strategy passes a prop firm challenge. How to check it on historical trades and with Monte Carlo.
The rules that fail most traders
Most challenges combine a profit target per phase with a daily loss limit and a maximum loss — static or trailing. Some add minimum trading days, time limits or a consistency rule that caps the share of the best day. Exact values differ by firm and program and change often; always check the firm's current terms.
Two ways to test
Historical: run your strategy's real trade sequence through the rules, starting a new attempt every month, and count how often it would have passed and why it failed.
Monte Carlo: reshuffle the same trades thousands of times to see the range of outcomes. Drift Engine offers both, with editable rules for any firm.
FAQ
Why is a backtested pass rate an upper bound?
Because most simulations book results at trade exit, while prop firms also count open losses (equity). Real results are usually somewhat worse.