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Trading calculators

Quick maths to sanity-check a plan, a bot or a challenge before you risk money on it. Got a report or statement? Check the real thing.

• Position size calculator
  Work out how many lots to trade so a stop-loss only costs the share of your account you choose. Free, no sign-up.
• Drawdown recovery calculator
  Lose 20% and you need 25% to get back. Lose 50% and you need 100%. See the gain needed to recover from any drawdown.
• Losing streak calculator
  Even a good strategy has long losing runs. See the chance of a run of losses, the longest run you'd usually see, and what it costs.
• Prop firm challenge calculator
  Risk per trade, win rate and reward to risk against a profit target, max loss and daily loss limit: thousands of simulated challenges show your odds of passing.
• Martingale calculator
  See how fast lot sizes and losses grow when a bot doubles up after each loss, and how likely the losing run that wipes it out is.

Check a real file free More calculators

Education, not financial advice. Simple models with the assumptions shown; real trading has costs, gaps and rules these leave out. Nothing you type here leaves your browser.