Forex Trading Calculators & Tools

Lot size = (account balance × risk %) ÷ (stop-loss in pips × pip value per 1.00 lot). Example: a $10,000 account risking 1% ($100) with a 25-pip stop on EUR/USD ($10 per pip per lot) gives 100 ÷ (25 × 10) = 0.40 lots. Use the Position Size calculator above to do it instantly for any pair.

For pairs quoted in USD (EUR/USD, GBP/USD, AUD/USD) one pip on a 1.00 standard lot is worth $10. For other pairs the value depends on the quote currency and the current exchange rate — for USD/JPY it is 1,000 JPY divided by the USD/JPY rate. On gold (XAU/USD) a move of 0.10 on 1.00 lot is worth $10.

Required margin = lot size × contract size × price ÷ leverage, converted into your account currency. For example 1.00 lot of EUR/USD at 1.1600 with 1:500 leverage needs about $232 of margin.

Many traders aim for at least 1:1.5 or 1:2. The ratio only matters together with your win rate: with 1:2 you break even at a 33.3% win rate, with 1:1 you need more than 50%. Check your numbers with the SL / TP & R:R and Expectancy calculators.

Most prop firm challenges have a daily loss limit (commonly around 5%) measured from the balance or equity at the start of the day, and a maximum loss limit (commonly around 10%) measured either from the initial account size (static) or from the highest balance reached (trailing). Rules differ between firms, so always check your firm's terms. The Prop Firm Challenge calculator shows how much you can still lose today and the largest lot you can take.

More than you lost: a 20% drawdown needs +25% to recover, 50% needs +100%, and 75% needs +300%. That is why keeping risk per trade small matters more than chasing big returns.

Martingale increases position size after every loss. A normal losing streak makes the position grow exponentially until one more loss wipes out the account. The Martingale vs Fixed Risk simulator on this page shows the difference on the same sequence of trades.

Yes. All calculators and tools on this page are free to use, work in your browser and require no registration. Results are estimates — always confirm exact values in your MetaTrader terminal.