Position size & risk calculator
Size a trade for MetaTrader 5, then check it survives a losing streak — not just a single stop.
Diagnosis
What this setup implies, before you run it.
Survival
What the same risk setting looks like after a streak of losses. Balance-proportional sizing shrinks the stake as you lose; a fixed lot does not.
| Losing streak | Balance-proportional | Fixed {lots} lots | Balance left |
|---|---|---|---|
| — | — | — | |
| — | — | — | |
| — | — | — | |
| — | — | — | |
| — | — | — |
Risk of ruin
EAs that fit this account
How this is calculated
Lot size is risk amount divided by (stop distance × pip value), then rounded down to your broker's lot step. Rounding up would breach the risk you set, so the exact figure is shown next to the tradable one instead of replacing it.
Pip value is pip size × contract size, converted into your account currency with the rate you supply. For instruments where contract size is broker-specific — indices, metals, crypto, commodities — no value is shown at all, because guessing one would quietly change every number on this page.
Risk of ruin uses Balsara's analytic solution: the probability of losing a fixed share of the account before the edge plays out, given a win rate and a reward-to-risk ratio. It assumes independent trades of constant risk, which is optimistic — real losing streaks cluster. Treat it as a floor, not a forecast.
Everything above runs in your browser. No balance, symbol or setting is sent to a server, and there is nothing to delete afterwards.
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Figures are calculations from your inputs, not predictions. Nothing here is investment advice.