Free Tool
Risk Management Calculator
Two calculators for prop firm traders. Size your position against where your account actually stands right now — then simulate the odds it survives the next 100 trades.
1. Contract size for your current balance
Sizing against your starting balance ignores how much drawdown room is already used. This sizes against your live buffer — what's actually left between your current balance and the floor.
2. Account survival probability
Runs 5,000 simulated trading sequences from your win rate and average trade sizes. Shows the probability your account stays above the drawdown floor over the next N trades, plus a sensitivity table across win rates.
Simulations assume independent trade outcomes with fixed win/loss amounts. Real trading has variable outcomes, correlated losses, and slippage — use this as a risk model, not a prediction.