Pass prop-firm challenges with honest math
Free calculators and plain-English explanations of the numbers behind trading challenges: your real pass odds, the right position size, and why some popular strategies quietly work against you.
Tools
Pass-odds calculator
Your chance of hitting the target before the drawdown, with daily limits, trailing drawdown, costs and time limits. Monte Carlo plus the exact gambler’s-ruin formula.
Risk-per-trade planner
How many losses in a row your drawdown and daily limits allow at each risk level, the most you can risk to survive a losing streak, and how risk changes your odds.
Lot size calculator
Lots for a given risk % and stop on EUR/USD, GBP/USD, USD/JPY, gold, US500, NAS100 and US30, checked against your daily loss limit.
Trailing vs static drawdown visualizer
Paste your trades and see where a static, end-of-day trailing and per-trade trailing drawdown would each have stopped you out.
Days-to-target calculator
How many trading days your stats need to reach the profit target, with minimum trading days, time limits and a simulated range.
Consistency rule checker
Check whether your best day is too large a share of your profit, how much more you need, and the biggest day you can add next.
Payout and profit-split calculator
What a funded payout is worth after the split, fee refunds and payout fees, and what getting funded really costs once failed attempts count.
Martingale vs bold play
Same zero or negative edge, three staking plans. See which one passes most often, and why.
Prop firm rules compared
Targets, drawdowns and daily limits for Lark Funding, FTMO, FundedNext, The5ers, Topstep and Apex, from the firms’ own pages.
Latest articles
- How to plan a prop challenge before you buy it
A step-by-step plan for a prop-firm challenge: read the rules, measure your edge, pick your risk, estimate pass odds and time to target, and decide if the fee is worth it.
- Why traders fail prop challenges: 8 avoidable mistakes
The most common ways prop challenges are lost, from daily loss limit breaches and oversizing to misreading drawdown rules, and the simple checks that prevent each one.
- Trailing vs static drawdown: how prop-firm rules work
Static, end-of-day trailing and intraday trailing drawdowns explained with worked examples, why the same trades can pass one and fail another, and how to trade each type.
- Losing streaks in prop challenges: how many to plan for
The exact odds of 5, 8 or 10 losses in a row at different win rates, and how to size your risk so a normal losing streak can’t end your prop challenge.
Three facts most traders never hear
Exits can’t create an edge
On a random price, any stop, target or trailing rule has zero expectancy before costs. Why
No edge still passes ~40%
Before costs, your odds are max loss ÷ (target + max loss). Costs take most of it away. The numbers
Martingale loses to bold play
With no edge, fewer and larger trades pass more often than doubling down. The simulation