To add an Expert Advisor (EA) to your MT4/MT5 platform, follow these steps:
In the desktop version of MT4/MT5, click on 'File' at the top menu.
Select 'Open Data Folder.'
Open the 'MQL4' or 'MQL5' folder.
Inside, locate the 'Experts' or 'Indicators' folder and place the necessary EA files there.
Close and restart MT4/MT5. The EA should now appear in the navigation window.
If you experience any issues adding the EA, or if it does not function correctly after being added, please contact the EA provider directly for support.