(67)For the purposes of ensuring that an investment firm obtains the best possible result for the client when executing a retail client order in the absence of specific client instructions, the firm should take into consideration all factors that will allow it to deliver the best possible result in terms of the total consideration, representing the price of the financial instrument and the costs related to execution. Speed, likelihood of execution and settlement, the size and nature of the order, market impact and any other implicit transaction costs may be given precedence over the immediate price and cost consideration only insofar as they are instrumental in delivering the best possible result in terms of the total consideration to the retail client.