(24)Since the use of high frequency algorithmic trading technique is predominantly common in liquid instruments, only instruments for which there is a liquid market should be included in the calculation of high intraday message rate. Also, given that high frequency algorithmic trading technique is a subset of algorithmic trading, messages introduced for the purpose of trading that fulfil the criteria in Article 17(4) of Directive 2014/65/EU should be included in the calculation of intraday message rates. In order not to capture trading activity other than high frequency algorithmic trading techniques, having regard to the characteristics of such trading as set out in recital 61 of Directive 2014/65/EU, in particular that such trading is typically done by traders using their own capital to implement more traditional trading strategies such as market making or arbitrage through the use of sophisticated technology, only messages introduced for the purposes of dealing on own account, and not those introduced for the purposes of receiving and transmitting orders or executing orders of behalf of clients, should be included in the calculation of high intraday message rates. However, messages introduced through other techniques than those relying on trading on own account should be included in the calculation of high intraday message rate where, viewed as a whole and taking into account all circumstances, the execution of the technique is structured in such a way as to avoid the execution taking place on own account, such as through the transmission of orders between entities within the same group. In order to take into account, when determining what constitutes high message intra-day rates, the identity of the client ultimately behind the activity, messages which were originated by clients of DEA providers should be excluded from the calculation of high intraday message rate in relation to such providers.