In order to apply trading indicators to your MT4 (MetaTrader4) platform, please log into your AvaMetaTrader and follow these steps:

1. Launch your AvaMetatrader:
2. Select "File" -> "Open Data Folder"
     
3. Select "MQL4" -> "Indicators"  To add the custom indicator, drag the custom pre-installed indicator into this folder;
4. Restart your AvaMetaTrader; Or refresh the indicators folder:
   1. To show Navigator type “CTRL + N” or select "View" -> "Navigator";   
   2. Right-click and chose "Indicators" in the Navigator Window -> select “Refresh”.  
   3. Select "Insert" -> "Indicators" -> "Custom"                                                                                         
   4. Select the desired indicator.