Learn prop trading · lesson
Calculate an ideal risk profile
Risk per trade should not come from feelings or round numbers. It is worked backwards from the account's breach rules, and the template below shows how.
Start from the daily loss limit
A common rule of thumb says the daily limit should never be reachable in fewer than 4-5 losing trades. With a 4% daily limit, that means at most 0.8-1% risk per trade, and a stop for the day after 3 losses. A bad day then costs under 3% and never cascades into a breach.
Then check the max drawdown
Dividing the max drawdown by the risk per trade gives the number of net losers the account can survive. At 0.5% risk against an 8% drawdown the account survives 16 straight losers; at 2% it survives four. A 45% win-rate strategy will see 6-8 loss streaks over a few hundred trades. Traders should size so a normal streak is an annoyance rather than the end of the account.
Respect the drawdown type
A trailing drawdown changes the math. Profits raise the floor, so early winners do not build a buffer that can be spent later. On trailing programs, traders should halve the risk number from the steps above until the limit locks at breakeven (most lock after a 5-6% gain).
The template
Risk per trade = min(daily limit ÷ 5, max drawdown ÷ 12, half-Kelly of the tested edge). For a typical 5%/10% static program with a modest edge, that lands at 0.5-1%. If a program's rules force that number below what its profit target can realistically be reached with, the program is mispriced for that trader. The better move is to pick another program rather than oversize.
The next step is to check the theory against real program rules.
See every program's limits side by sideThis is educational content, not financial advice. The formulas assume independent trades and accurate backtests, and real trading is streakier. Traders should never risk money they cannot afford to lose.