I want to amend my MetaTrader credentials from my Android device. How can I do so?

On the application, go to the Menu icon to view more options.

On the menu panel, tap on Manage Accounts. 

On the Accounts page, tap on the account properties icon and select Change Password.

Proceed by selecting Change Master Password and typing your Current Master Password. In the next text options, type your New Master Password and type it again to confirm this change. To finalize, tap on Next.

The password change is now complete! Tap OK to finish.