What is a Margin Call?

Margin call level is the level of required margin (warning level) when the state of your trading account turns the color red in your terminal. It notifies you that you should do something with your account to prevent your orders from being compulsorily closed.
Margin Call depends on account type, for Cent, Cent NDD it is 50% of margin level, for Classic, Classic NDD, Pro-STP it is 100% of margin level.