What is the maximum amount of money I can transfer from my trading account?

If you don't have any open positions on your trading account, you can transfer out the full amount of Equity less Credit.

If you have open positions on your trading account, you can transfer out only the amount that is less or equal to the Available amount on your trading account.

The Available amount is the maximum amount that you can transfer out while keeping the Margin Level above 200%. After transferring out the remaining Equity less Credit must be greater than or equal to 200% of the Used Margin. 

If your Margin Level is less than 200%, you will not be allowed to transfer any funds out of your trading account. In that case, you should close some of your positions to increase your Margin Level and be able to transfer out the funds.

*Available amount on trading account = Equity - (2 * UsedMargin) - Credit

**MarginLevel = Equity / UsedMargin (must be > 200%)