Any direct access broker will provide quotes through their execution platform. Check lightspeed or talk to some prop firms. Even the lower tier ones since all you want is the quotes.
Realtime data will cost you no matter how you look at it. Most retail brokers (like TD, Etrade) do not provide quotes to all ECNs.
Realtime data will cost you no matter how you look at it. Most retail brokers (like TD, Etrade) do not provide quotes to all ECNs.