Finally, I got margin call and all position were closed at 30% margin, not at 50% as I learn from their website.

I used 10,000 margin when the account was at $11,750 with 3 positions (8 lots + 8 Lots + 4 lots). All postions were closed when the account was at $2,999 which just below 30% margin.

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Account number: 11254212
Investor password: 50to30
Server: Thinkforex-Demo
I love taking risk with the right returns.