Position size calculator

Translate a cash risk budget and stop distance into lots, rounded down to the allowed lot step.

How this calculation works

Risk budget = equity × risk percentage. Cost per lot = stop distance × contract size × conversion rate + costs per lot. Divide the budget by that cost, then round down to the lot step.

Illustration: a 100 cash budget and a 10 price-unit stop on a 100-unit contract allow 0.10 lots before costs when both currencies match.