Spread 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 Spread.rar contains Spread.ex4 and Spread.mq4)
Free Download Spread mt4 indicator 
How to install Spread in forex trading platform metatrader 4?
- Extract the downloaded Spread.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 Spread.ex4 and Spread.mq4 files into indicators folder and restart the MetaTrader 4.
