How to add a downloaded indicator in MetaTrader 4
Find the MT4 file that you have downloaded and copy it to your clipboard. Then, in MT4, go to ‘File’ and select ‘Open Data Folder’. From the resulting window, open the ‘MQL4’ folder and then the ‘Indicators’ folder. Paste your copied indicator into this folder.
Then, restart MT4.
The new custom indicator should now appear in your list of indicators in the ‘Navigator’.