Efi is a mt4 (MetaTrader 4) indicator and it can be used with any forex trading systems / strategies for additional confirmation of trading entries or exits.
(downloadable file Efi.rar contains Efi.ex4 and Efi.mq4)
Free Download Efi mt4 indicator 
How to install Efi in forex trading platform metatrader 4?
- Extract the downloaded Efi.rar.
- Go to “File menu” in Mt4 trading platform and click “open data folder”. Open Mql4 folder and open the indicators folder.
- Now paste the Efi.ex4 and Efi.mq4 files into indicators folder and restart the MetaTrader 4.
