Ask for more deposits after pointing out the insufficient account balance. Don't allow me to close positions when I profit a lot, untill my positions are wiped out. I called the ucstomer service in time but my phone wasn't answered. I can contact them only by messages. And they didn't give me a reasonable explanation. There was no problem throng the system. If the trading system was blocked, that means your advance ratio is lower than designated ratio. But mine was normal.