Free Tool
Risk Management Calculator
Two calculators built for prop firm traders. Size your position based on where your account stands right now — then simulate the probability it survives the next 100 trades.
1. Contract size for your current balance
Sizing against your starting account ignores how much drawdown room you've already used. This calculator sizes based on your live buffer — what's actually left between your current balance and the floor.
2. Account survival probability
Runs 5,000 simulated trading sequences using your win rate and average trade sizes. Shows the probability your account stays above the drawdown floor over the next N trades — and a sensitivity table across different 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.
Get a Pine Script sized for your drawdown limits.
Our strategies include a built-in risk module that respects daily loss limits and drawdown floors — no manual position sizing needed.
View Plans Drawdown Calculator