Since Mtrading has the Negative Balance Protection Program, you can request the Balance to be reset.
Note the following options:
1) your negative balance is up to -35$.
In this case, the reset will be done automatically next day and you'll be able to deposit and trade again.
2) you have a negative balance of more than -35$.
In this case, you'll need to send us a request to support@mtrading.com from your registered email address and wait for the results of the review (usually within a day).
For example, you have a balance of '-73$'. Then your email will look like this:
Subject: Negative Balance Correction
Dear Support, please help to reset my negative balance.
Account number: 654321
The current balance is - 73$