Our Margin Rules are as follows:

Margin Call: 100%
Stop Out Level: 70%

If you reach 100% margin, you will get a margin call and you will not be able to open any more trades. 

If you reach a 70% margin or below a ''Stop Out'' will occur. MetaTrader will then start to close your open trades one by one.

In order to keep your margin levels higher, you may either increase your equity by adding more margin to your account or decrease the margin you are trading on by lowering the lot size of your positions.