I don’t do visual trading, but I have IQfeed and IB data, and I trade liquid US equities. The IB last price gets to me 300-500ms faster than IQFeed. It’s pretty accurate, enough that it became the basis for my algo logic. I use IQFeed for research only. I’m 9ms away from IB central gateway, and 30ms away from IQFeed in Nebraska, but none of that matters, considering the measured difference.I am trying to have a set up where I will pay for data separately and will use IB for execution only