This script is based on www.changer.com api. When client make exchange with this script if you are set up your referral id from Changer, you will receive the 15% of amount as comission if exchange status is ok. In documentation is included lesson how to get your referral id. Script have and own referral system who gives client 6% reward of this 15% when other client make exchange with his/her referral.

Demo: http://codecanyon.net/item/money-exchange-script/13538657