Quote from romik:
how much is NxCore? What would be the fenefit from switching from IQfeed retail feed?
NxCore starts at $500 per month. The benefit is it is a full broadcast feed (you don't set a watch list of symbols) of every trade and every quote for the exchanges you subscribe to. The key advantage of this feed is the compression/efficiency of the delivery. For example, the entire US equities feed can be sent on a standard broadband connection with high reliability and low latency. It is build for the institutional market, and thus there are no retail 3rd party applications that currently support it (most retail users aren't willing to pay for it).
Jay