Lawati web berikut:
- https://eaforexprogramming.blogspot.com/2013/01/how-to-protect-ea.html
- https://www.signalmagician.com/add-license-key-mt4-ea/
- https://forextradingstrategies4u.com/mt4-trailing-stop-ea/
- https://myforexwebsites.blogspot.com/2012/11/cara-protect-ea_9273.html
- https://myforexwebsites.blogspot.com/
- https://jumforex.blogspot.com/2012/08/belajar-membuat-ea-sederhana-7.html