<![CDATA[Electronic Trading Systems (PMSE) are identic with the massive use of digital platforms. Digital platforms within PMSE are multisided markets that using an algorithms, particularly recommendation algorithms, as an instruments to provide product preferences to consumers based on historical consumer data detected within the platform system. The existence of recommendation algorithms raises issues when they are misused by business platform operators for their own benefit to promote their own products. This has the potential to violate competition law, namely market control in accordance with Article 19 a, c, and d of Law Number 5/1999, thereby creating barriers to entry for competing business actors and potential business actors. This type of research is a legal research as a tool for legal problem solving that used three method, namely the statute approach, conceptual approach, and cases approach. This research findings stated that the use of recommendation algorithms by PMSE business actors has the potential to violate competition law, particularly abuse of market power measure that create barrier to entry for competing business actors and also harms the consumer based on theory of harm analysis. Then, PMSE businesses actors can propose binding commitment to change business behavioral before filling a objection attempt to the commercial court.]]>
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