Tools

Position size

This is a risk-control tool, not a trade idea. You choose the most you are willing to lose; it tells you the largest position consistent with that. Working this out beforehand is the single habit that separates people who survive a bad run from people who do not.

What this calculator ignores

  • A stop-loss is not a guarantee. In a fast market, orders fill below the stop, sometimes far below.
  • Sizing a position correctly does not make it a good position.
  • This is arithmetic on the numbers you typed. It is not advice, and it does not know your circumstances.

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