Trade the Numbers, Not the Guesswork

Three quick tools for prop traders — size a position to your risk, see your real payout after the split, and check any firm's consistency rule before it costs you. Everything runs in your browser; nothing is saved or sent.

It turns a risk rule into a concrete lot size. Enter your account balance, the percentage you're willing to lose on the trade, and your stop-loss distance — it returns the largest position that keeps your loss at or below that amount if the stop is hit. Sizing to a fixed risk percentage is the single most reliable way to survive a prop firm's daily-loss and max-drawdown limits.