Direct answer
A margin call in forex is a notification that your trading account has too little usable equity to meet the margin requirement needed to keep one or more open positions. In plain terms: as the trade moves against you, your account equity can fall, and once it reaches (or crosses) a broker-defined threshold, the broker asks you to take action—typically by adding funds or reducing exposure.
Because margin rules are set by the broker and the account type, a margin call does not have a single universal trigger point across all platforms.
How margin call works in forex
Forex brokers allow trading with leverage, meaning you control a larger position size than your own cash balance. To protect the broker against potential losses, the broker requires margin. Key terms:
- Used margin: the portion of your account value set aside to support your open positions.
- Equity: account value including floating profit and floating loss.
- Free margin: the difference between equity and used margin.
- Margin requirement / margin level: thresholds that determine whether you still have enough equity for your positions.
As price changes, floating profit/loss changes equity. If losses increase, equity can decrease while used margin remains tied to your open positions. When equity becomes insufficient relative to the margin requirement, the platform can trigger a margin call.
What the margin call “means,” practically, is that continued holding becomes at risk. Many systems also apply a stricter condition that can lead to stop-out (forced closing of positions) if the account equity keeps falling.
Example and independent checks
Consider an account with leverage where opening positions requires used margin. If the market moves against your positions:
- Your equity declines due to increased floating loss.
- Free margin shrinks because used margin stays in place.
- Once the platform’s margin threshold is reached, you may see a margin call.
Independent checks you can do on your own platform view:
- Look at equity, used margin, and free margin.
- Check whether your platform shows a margin level (often expressed as a ratio) and how close you are to the threshold.
- Review the broker’s margin policy wording for how and when a margin call is issued.
Relevant limitations and risks
A margin call is not a prediction of a specific outcome; it is a risk-management mechanism based on current account math and broker rules. Important limitations:
- Thresholds vary: different brokers (and account types) can use different triggers, such as a margin level percentage or another internal formula.
- Timing can differ: margin calls may appear at different moments depending on the platform’s update frequency.
- Outcome is not fixed: even after a margin call, what happens next (such as whether positions are later reduced or closed) depends on the broker’s stop-out rules and your actions.
If you are trying to understand your specific case, the only fully reliable source is the documentation and risk/margin policy of the broker/account you are using.