Prop Firm Challenge Simulator

How the simulator works

Every prop firm evaluation is a race between two finish lines: the profit target and the loss limits. Your win rate and average win decide which one you are likely to hit first — but only on average. The order in which wins and losses arrive matters just as much, and that is pure chance.

The simulator plays out 5,000 random challenges with your numbers. Each trade wins with your win rate and pays your average win in R, or loses 1R. Risk is a fixed percentage of the starting balance, the way most prop traders size. A challenge ends when you hit the target (after any minimum trading days), breach the daily loss limit, breach the maximum drawdown, or run out of days.

Reading the results

• Chance of passing — the share of simulated challenges that reached the target without breaking a rule.
• Failure split — whether your risk is mainly exposed to the daily limit or to the overall drawdown. A high daily-limit share means you are risking too much per day.
• Median days to pass — half of passing runs finished faster, half slower.
• Expectancy — average profit per trade in R. If it is zero or negative, no risk setting fixes it.

What to change if your odds are low

Lower risk per trade first. Dropping from 2% to 1% usually raises the pass rate sharply, because a losing streak is far less likely to reach the drawdown limit. It takes longer — but most firms now allow plenty of time.

Add a daily stop rule. Stopping after two losses in a day protects the daily limit and is one of the cheapest improvements available.

Check trailing drawdown carefully. With a trailing limit, profits you give back count against you. Compare the static and trailing settings to see the difference for your stats.

For a full risk plan, read how to pass a prop firm challenge, size each trade with the position size calculator or futures calculator, and compare rules across firms on our prop firm comparison.

Limitations

The simulator assumes every trade is independent and that wins and losses are always exactly your averages. Real trading has streaks, slippage, variable position sizes and consistency rules. Use your journal’s real numbers, and treat the result as a guide to risk settings, not a forecast.