Estimate your probability of passing a prop firm challenge based on your strategy and risk management.
A prop firm challenge is an evaluation period where traders must hit a profit target within strict risk rules to qualify for a funded trading account. The trader pays a fee for the evaluation, and if they pass, they're given access to firm capital and keep a share (typically 70–90%) of the profits they generate.
The two non-negotiable rules in nearly every challenge are: a maximum overall drawdown (usually 8–12% of account size) and a daily drawdown limit (usually 4–5%). Breach either, and the challenge is failed instantly — regardless of how close you were to the profit target. Some firms also impose a minimum trading day count and a maximum evaluation window (e.g. 30 calendar days).
This combination of rules — hit a profit target, stay under tight drawdown limits, and do it within a time window — is exactly what this simulator models.
Over-risking. The fastest way to fail is sizing up to hit the target quickly. Risking 2–3% per trade gives a great chance of fast profit — but it also gives a daily drawdown breach after just two losses. Pros risk 0.5–1% during evaluations precisely to protect against this.
Variance. A profitable strategy can still produce a string of 4–6 losses in a row. With a 5% daily limit and 1% risk, you have margin for that. With 2% risk, you don't. Monte Carlo–style randomness destroys traders who didn't plan for it.
Emotional decisions. After a losing day, many traders chase by oversizing the next day. After a winning streak, many switch to overconfident sizing. Both behaviors compress the buffer between current equity and the drawdown floor — and one bad sequence ends the challenge.
There's no single "good" number — pass probability depends on the combination of win rate, average R, and risk size. A 45% win rate at 2R with 1% risk has a strong pass probability. A 60% win rate at 0.8R with 2% risk often fails because the drawdown limits catch you before the target. Use the simulator to test your real stats.
0.5%–1% per trade is the sweet spot for most challenges. It keeps you comfortably under a 5% daily drawdown even after 3–4 consecutive losses, and still lets you reach a 10% target in 4–6 weeks with positive expectancy. Risking 2%+ dramatically increases failure rates due to daily drawdown breaches.
Yes — and frequently. A trader with genuine long-term positive expectancy can still hit a losing streak in any given 30-day window. The challenge window is short relative to a full trading career, so variance has more weight. This is why pass probabilities rarely exceed 50–60% even for skilled traders.
Daily drawdown is the silent killer of prop challenges. Overall drawdown is wide — usually 10% — so a few bad weeks won't end you. But daily drawdown of 5% means just 3 losses at 2% risk can disqualify you instantly. Daily limits punish over-sizing far more than they punish bad trade selection.
They model the statistical reality of trading variance accurately given your inputs. What they don't capture: slippage, news events, emotional mistakes, sizing errors, or strategy drift across market regimes. Treat the output as a best-case scenario for the inputs you provided — real results are usually somewhat worse.
Three rules win challenges: (1) Risk no more than 1% per trade. (2) Cap daily loss at 2× your per-trade risk (stop trading for the day after two stops). (3) Don't accelerate sizing after a winning streak. This produces a slow, boring, compounding curve — which is exactly what passes evaluations.
More trades per day increases the variance of your daily P&L. If your daily drawdown limit is tight, fewer high-quality trades is usually safer than many small ones. Test both in the simulator using your actual average trades-per-day to see which produces a higher pass rate.
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