Fixed fractional sizing: how do you calculate yours?

Fixed fractional means risking the same percentage of the account on every trade — 1% is the classic. The maths is simple; the discipline is the hard part, because the percentage wants to drift with confidence.

Fixed fractional sizing: how do you calculate yours? — risk-reward diagram
A risk-reward ratio of 1 to 2

How do you run it?

  • your percentage and how you settled on it
  • whether you recalculate per trade or per day
  • how the method behaves through drawdowns
Fixed fractional sizing: how do you calculate yours? — drawdown and recovery diagram
An equity curve during a drawdown and its recovery

The position sizing guide walks through the calculation step by step.

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