What is a margin call?

A margin call is one of those phrases that sounds scary — and honestly, it should get your attention. But it's simple to understand, and understanding it is how you avoid it.

What a margin call actually is

A margin call is a warning from your broker that your account no longer has enough free margin to support your open trades. In plain terms: your losing positions have eaten into your cushion, and you're getting close to the point where the broker will start closing your trades.

It's a red light on the dashboard. Not the crash itself — the warning before it.

What triggers it

Remember the margin level (equity divided by used margin). As your open trades lose money, your equity falls, and your margin level drops. When it falls to the broker's margin-call threshold — often around 100 percent, though it varies — you get the margin call.

A simple example

You deposit 2,000 dollars and open positions using 1,000 dollars of margin.

• Trades go well → equity rises, margin level is healthy, no problem.
• Trades go badly → your floating loss grows. Equity drops from 2,000 toward 1,000. As it nears your used margin, your margin level falls toward 100 percent, and the margin call triggers.

What you can do when you get one

A margin call is a decision point. You have options:

1. Add funds to restore your margin level (only with money you can afford — never chase losses you can't cover).
2. Close some positions to free up margin and reduce risk.
3. Reduce position sizes to lower the margin you're using.

Doing nothing is also a choice — and usually the worst one, because it leads straight to a stop-out, where the broker force-closes your trades automatically.

How to avoid margin calls in the first place

This is the important part. Margin calls are almost always the result of two mistakes: trading too big and not using stop-losses.

• Keep plenty of free margin. Don't commit all your buying power. Cushion is survival.
• Use a stop-loss on every trade. A stop-loss closes a losing trade at a level you chose — long before it can drag your whole account to a margin call.
• Trade smaller sizes. Smaller positions use less margin and move your account balance more gently.
• Avoid piling on correlated trades. Ten trades that all lose together can trigger a call fast.

Is a margin call the end?

No. It's a warning you can act on. But if you regularly hit margin calls, it's a clear sign you're trading too large for your account. Treat each one as feedback: reduce size and give yourself more room.

The bottom line

A margin call is your broker's warning that losses have shrunk your cushion and your open trades are at risk. Respond by adding funds, closing positions, or cutting size — and better yet, avoid them entirely by trading small, keeping free margin, and always using a stop-loss. Ignore a margin call and the next step is a stop-out, which we cover next.