How is cot written?

Excuse me, could you please clarify for me how the term "cot" is typically written in the context of cryptocurrency or finance? Is it an abbreviation for a specific concept or a typo for another commonly used term? I'm just trying to get a better understanding of the terminology being used here. Additionally, if it's relevant, could you provide some context on where or how this term is often encountered in the field? Thank you for your help.