Abstract: A system and method are disclosed that include, in one or more implementations, receiving, with one or more processors from a computing device associated with a broker/dealer, electronic transaction information representing a first transaction executed by a first user. At least one other user is identified to receive a notification of a transaction associated with the first user. A notification that represents the first transaction is transmitted to at least one computing device respectively associated with at least one other user, and an instruction is received that represents an order to execute a second transaction on behalf of the at least one other user. The second transaction copies the first transaction, and the one or more processors generates and transmits an instruction to execute the second transaction.