Sizing for how you trade
Position sizing on a funded account
On a funded account the loss limit is not a preference, it is the terms. A size that is approximately right is fine on your own money and is a failed evaluation on someone else's, because the breach is measured in realised loss including every fee.
What goes wrong
- The limit counts commission and funding, and a size set from price distance alone does not
- Two stop-outs at a slightly oversized position can put a day over the line
- Rounding a size up to the next lot step is a decision nobody makes on purpose
What ZRisk does about it
Risk set in money, not in guesswork
Set what a losing trade costs, and the size follows it, with fees inside the number.
Never rounded up past the minimum
Lot rounding can never be what pushes an order over the size you meant, and a genuinely impossible size warns you instead of being quietly rewritten.
Liquidation checked against your stop
If liquidation would arrive first, the order is blocked rather than warned about.
A record you can show
Per position: entry and exit commission, every funding payment, and the result in R.
In numbers
If a loss limit is $500 and each of two trades is sized 4% over because fees were left out, the day can close $40 past the line on trades that both went exactly to plan.
Size your next one properly
Start with the free calculator. No account, no key, nothing to install.
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