For those who are not sure when you set Offset GMT. Therefore I will give several examples.
Example 1: Time in the terminal = 14.00, and GMT=11.00; then GMT_offset = 3
Example 2: Time in the terminal = 9.00, and GMT=11.00; then GMT_offset = -2
If you still doubt correctness of the actions, then connect monitoring of the account through myfxbook and you look in information of the account: