Question on Market depth Dom

Where is the cheapest broker to see order flow and market depth
DOM of futures.
I know their are brokers, many place to find it, but I am not find anything
that is free or cheep.

I'm pretty sure Infinity Futures offers it through their one of their professional packages; I think Sierra Charts is one of them, and runs at most $15/month if you don't meet a small threshold; check their site for videos and info - they're very customer service oriented, and one of the rare places that do want you to succeed. I also though any one of the constantly increasing Ninjatrader brokerages offer it, usually for free.