Installing a custom indicator in MetaTrader4 is easy:
1) Download and Install the Indicator to your desktop
2) Right click to copy the Indicator
Click “File” -> “Open data folder” – “MQL” –> “Indicators”
4)Right click and paste the Indicator into this folder… (2 more steps below)
5) Close your MT4 and reopen it
Switch back to MT4 program -> Right click on the list of Indicators -> Click “Refresh” (See Photo Below).
6) View your Navigator window and the Custom Indicators folder to see the newly installed Indicator.