(3)It is possible that market abuse behaviours, including market manipulation, are carried out through various means, including algorithmic trading. Therefore, 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. Where more than one person make an investment decision, the crypto-asset service provider should identify in its records the person with primary responsibility for the decision.