You might follow the instructions below to change your trading account password:
1. Login your Client Portal , choose the trading account you wish to change the password, click on the 【】and then click "change password" to change it
2. On the PC MetaTrader terminal, go to "Tools" in the top tool list> "Option" from the menu and then visit the "Server" page > "Change."
3. On the IOS MT4 app, go to the "Settings" page > click on the account tab on the top > click "⋯ " icon of the current account > change password > change master password
4. On the Android MT4 app, click 「≡」at the top left corner of the app > manage account > click "⋯ " icon > change password > change master password