Forex Position Size & Risk Calculator
Find your lot size from account balance, risk and stop-loss — and see the dollar risk. Plus copy-sizing for multi-account traders.
Size every trade to a fixed share of your account: enter your balance, the percentage you'll risk, and your stop-loss distance — the calculator returns the lot size and the dollar risk at the stop. Switch to Copy sizing to scale one trade across accounts of different sizes by equity-ratio or a fixed multiplier — the same arithmetic Trepeat's engine runs on every copy.
Position size
0.50lots
$ risk at stop
$100.00
For information only — this is an arithmetic tool, not trading advice. Pip value depends on the symbol + account currency; the default ($10/pip per lot) is ≈ a USD-quoted major like EURUSD — set your own for JPY pairs, metals or indices.
Example
One source, scaled to every follower.
A single 1.00-lot trade on a $50,000 source account, sized to each follower by equity-ratio.
| Account | Balance | Lot |
|---|---|---|
| Source | $50,000 | 1.00 |
| Follower A | $100,000 | 2.00 |
| Follower B | $25,000 | 0.50 |
| Follower C | $10,000 | 0.20 |
Each follower scales by its balance — no per-account maths, no manual lot entry. Trepeat does this on every trade.
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Stop sizing copies by hand.
Set one sizing rule per repeater and every follower is scaled automatically on each trade. Start with a 14-day free trial — cancel anytime.
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FAQ
Lot-size calculator — common questions
How copier sizing works, plus everything about Trepeat.