How to Calculate Risk Per Trade
Planned monetary risk is an amount assigned to a trade scenario. A percentage makes that amount comparable with account balance, but it does not guarantee that execution losses will stop at that amount.In this guide
- Convert a percentage into money
- Connect the budget to the stop
- Account for exposure beyond one trade
Convert a percentage into money
Multiply balance by the percentage divided by 100. A $10,000 balance and a chosen 0.5% gives $50. To reverse the calculation, divide a fixed risk amount by balance and multiply by 100. A $75 amount on the same balance is 0.75%.
Connect the budget to the stop
If one lot would lose $500 at the planned stop, a $50 budget corresponds to 0.10 lot before costs. If the permitted volume step forces a smaller trade, actual modeled risk decreases. It should not be increased merely to reach a broker minimum.
Account for exposure beyond one trade
Several positions can lose together, especially when they share currency exposures. A per-trade percentage is not a portfolio risk model. Gaps, slippage, financing and commissions can raise actual losses. The example percentages in the risk calculator are arithmetic illustrations, not a recommendation of a suitable risk level for an individual.
Balance and equity are different inputs
Balance normally reflects settled transactions, while equity also reflects floating profit and loss. Decide which value your calculation uses and label it consistently. A 1% illustrative budget on $10,000 is $100; on $9,500 equity it is $95. Neither percentage is a recommendation. A percentage only becomes a money amount once its reference value is known.
Consider several open positions
Three separate $100 planned losses add to $300 if all three stops execute at their assumed prices. Correlated positions can lose together. The sum is a useful scenario, but gaps, costs and conversion changes can make the eventual result different. A single-trade calculator does not measure portfolio correlation.
Is the selected risk an exact loss limit?
No. It is the budget used in the model. Ordinary stop orders do not ensure that the fill price equals the trigger price. Keep the planned loss, actual fill result and account-level exposure as distinct quantities when reviewing a trading journal.
Try the related calculator with your own inputs and review its assumptions.
Further reading: Calculation methodology and related guides.
Educational information, not personalized investment advice. Verify broker rules and contract specifications.