What is MDX in trading?

Excuse me, but could you please elaborate on what MDX represents in the context of trading? I'm somewhat new to this field and I'm not entirely sure what this acronym stands for or how it's used in trading practices. Is it a specific type of asset, a platform, or a particular strategy? Could you provide some insight into its significance and how it might impact trading decisions or the overall market? Thank you in advance for your clarification.