To transfer custom indicators and EAs: Locate the MT4 data folder on your old installation (File > Open Data Folder) Copy the contents of the “MQL4” folder Find the same folder in your new MT4 installation Paste the copied files into the new “MQL4” folder Restart MT4 and verify that your custom tools are available Ensure compatibility with the new MT4 version and contact the indicator/EA developer if you encounter any issues.