What is a fio test?

Excuse me, could you please elaborate on what a "fio test" is? I've encountered this term in the realm of cryptocurrency and finance, but I'm not entirely sure of its significance or purpose. Is it a specific type of technical analysis tool? A risk assessment method? Or perhaps a regulatory compliance check? Any insight you could provide would be greatly appreciated, as I'm striving to enhance my understanding of the cryptocurrency market and its various intricacies.