Margin Call

In detail

Brokers monitor your margin level continuously:

Margin level = equity ÷ used margin × 100%

Two thresholds matter, and they vary by broker and regulator:

• Margin call level: a warning point (for example 100%). You may be blocked from opening new trades and asked to add funds or reduce positions.
• Stop-out level: the point at which the broker begins closing positions automatically, usually starting with the largest loser (for example 50%). In the EU and UK, retail accounts must be closed out at or before a 50% margin level.

The term comes from the days when a broker would literally telephone a client. Today it is usually an on-screen alert or email, and in fast markets the stop out may happen before you have time to react.

Example

Assume (illustratively) a $3,000 account opens 1 standard lot of EUR/USD at 1.0800 with 1:50 leverage.

• Used margin: 108,000 ÷ 50 = $2,160
• Starting margin level: 3,000 ÷ 2,160 = about 139%

Margin call at 100% occurs when equity falls to $2,160, which is a loss of $840, or 84 pips at $10 per pip.

Stop out at 50% occurs when equity falls to $1,080, a loss of $1,920, or 192 pips.

So an ordinary 84-pip move against this position triggers a margin call, and a 192-pip move closes it, wiping out nearly two-thirds of the account.

How to avoid one

• Size positions based on risk per trade, not on available margin.
• Use a stop-loss that closes the trade long before margin becomes a problem.
• Keep effective leverage modest so normal price swings do not threaten your account.
• Watch correlated positions, which can draw down equity at the same time.

Why it matters

A margin call is not a strategy signal; it is evidence that risk has already grown too large. Planning trades so you never see one is far better than reacting to it.