Forex glossary
What is a margin call?
A warning when your margin level falls to the broker's threshold; new trades are blocked.
Definition
Margin call: A warning when your margin level falls to the broker's threshold; new trades are blocked.
In context
When margin level drops to the broker's margin call level (often 100%), you get a warning and can't open new trades.
From the lesson Margin Calls and Stop Outs.