(5)Market abuse, including market manipulation, may be carried out through various means, including through algorithmic trading. Therefore, in order to ensure effective market surveillance, where investment decisions are made by a person other than the client or by a computer algorithm, that person or algorithm should be identified in the order and transaction records using unique, robust and consistent identifiers. For the same reasons, it is important to lay down that where more than one person in a crypto-asset service provider makes the investment decision, the person with primary responsibility for the decision is to be identified in the record.