(20)For reasons of clarity and legal certainty and to ensure a uniform application, it is appropriate to provide supplementary provisions in relation to the definitions in relation to algorithmic trading, high frequency algorithmic trading techniques and direct electronic access. In automated trading, various technical arrangements are deployed. It is essential to clarify how those arrangements are to be categorised in relation to the definitions of algorithmic trading and direct electronic access. The trading processes based on direct electronic access are not mutually exclusive to those involving algorithmic trading or its sub-segment high frequency algorithmic trading technique. The trading of a person having direct electronic access may therefore also fall under the algorithmic trading including the high frequency algorithmic trading technique definition.