Abstract: A computer based method for facilitating social network based trading on a computer comprises receiving an indication from a first interface device that a first transaction has been selected by a first user in a first security, providing transaction data defining the first transaction to a second interface device, through a social network, receiving an indication from the second interface device that a second user seeks to perform a second transaction copying at least one parameter of the first transaction in the first security, providing an option to the second user at the second interface device to pay an elective fee to the first user, and publicizing, on the social network, a fee paid for the second transaction from the second user to the first user.