This is probably a challenge unless you're in the industry, but I'm curious about how the specific details of a payment for order flow arrangement works. How d

This is probably a challenge unless you're in the industry, but I'm curious about how the specific details of a payment for order flow arrangement works. How does a brokerage choose which provider they route an order to (since they have relationships with multiple)? Does a provider have to execute an order if it is routed to them? Etc.