Martingale is a risky trading strategy that can cause your account to collapse in a long losing streak. However, you can reduce the risk by doing the following:

If you have 1000 USD, you can divide it into 2 accounts:

+ Account 1: balance 500 USD, trading 0.01 lot, setting Only Buy (Only Long).

+ Account 2: balance 500 USD, trading 0.01 lot, setting Only Sell (Only Short). Set this feature in the Common tab of Setting.

If it reaches a high-risk stage and 1 account evaporates, the remaining account will continue to be divided into 2 accounts and start over.

If the balance is larger, you need a plan to withdraw profits regularly.