I don't know about crypto but on stocks they're legally not allowed to execute a transaction outside the NBBO. See https://en.wikipedia.org/wiki/National_best_b

I don't know about crypto but on stocks they're legally not allowed to execute a transaction outside the NBBO. See https://en.wikipedia.org/wiki/National_best_bid_and_offer https://en.wikipedia.org/wiki/National_best_bid_and_offer