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Margin call calculator

Two distances every leveraged position carries: the move that triggers the warning, and the move at which the broker closes it for you.

Margin required1,666.67
Move to margin call16.67%
Move to stop out18.33%
Lost by stop out9,166.67

What the numbers mean

Equity is balance plus the position's running profit or loss. Margin call fires when equity falls to the broker's warning level - commonly 100% of required margin - and stop out closes the position when it falls to the closing level, commonly 50%. Both distances are knowable in advance, which is what this calculates.

A stop out is not a safety feature. By the time it fires, most of the account is already gone - it exists to protect the broker from your balance going negative, not to protect you from losses. Your own stop, placed well inside these distances, is the protection.

Worked example

A $10,000 account holds a $50,000 position at 30:1. Margin call at 100%, stop out at 50%.

  • Margin: $50,000 ÷ 30 = $1,666.67
  • Margin call when equity falls to $1,666.67 - a move of 16.67% against the position
  • Stop out at $833.33 equity - a move of 18.33%, with $9,166.67 of the account gone

The unit test suite pins these exact figures.

Embed this calculator

Copy the snippet. The attribution link is part of the licence to embed - keep it visible.

<iframe src="https://ticksprout.com/tools/margin-call?balance=10000&notional=50000&lev=30&mc=100&so=50&embed=1" width="100%" height="660" style="border:0" title="Margin call calculator" loading="lazy"></iframe>
<a href="https://ticksprout.com/tools/margin-call">Margin call calculator by Tick Sprout</a>

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Margin call calculator