This script is based on the www.changer.com api. When a client makes an exchange using this script, if you have your Referral ID set from Changer, you will receive 15% of the amount as a commission if the exchange status is OK. A tutorial on how to get your referrals is included in the documentation. The script has its own referral system that gives the client 6% reward out of this 15% when another client makes an exchange with his referral.