Question: How to add EAs(Expert advisers) on MT4 app of Android and iOS devices?
Unfortunately, you cannot add an EA script or Custom Indicator to MT4 mobile phone app.
If you like to run an EA(Expert Advisers) on your trading account, you will need to have a Windows PC(not recommended but also MAC) with the EA script added and that needs to be running 24/7 continuously.
As long as you are running your EA on your main PC, you can follow the activities of your trading account from your mobile devices.
EAs(and trailing stops) will be nonfunctional once the connection is cut even if it was just a moment, thus use of VPS(Virtual Private Server) is a very basic solution for running EAs on MT4.
In fact, there are many limitations of tools and options for the mobile version of MT4, so you are recommended to use Windows PC version of MT4 as your main device.
