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They're aren't expensive at IB, like one or two bucks a month for the major ones. More exotic ones may cost more, not really sure. I found the feed adequate, but most people think it's crap since it's highly filtered. You can do a search for more info since there are tons of threads on that topic.
Yeah, I think it's interesting when 15 min, 60 minute chart traders say that IB data feed is crap. At these higher time frames I think tick filtering and millisecond data bursts is immaterial. If you have a crappy trading method, no amount of true tick data is going to help you. If you've got a sound method, that amount of filtering is not gonna destroy it. If you are an HTF shop, then you should know better.
It is certainly adequate for higher time frame analysis. I have bot that swing trades running perfectly fine on IB data on a 10 min chart. If you include volume data in your analysis you may consider the impact of having full volume information from a true data provider, vs. whatever IB gives in in the way of volume.
One of the reasons that higher time frame traders can have a problem with IB data is that sometimes key highs and lows are not correct because these ticks are filtered out. There is a workaround to deal with this problem by using the true data (-TD) five second data. I used IB data for quite awhile but eventually decided it was worth it to pay for a separate feed to have confidence in the highs and lows.
I understand that IB also transmits the correct High/Low/Volume every 5 seconds, along with the milliseconds snapshots, which allows TWS to correct any missed bar data at least every 5 seconds. The issue is, not all software vendors currently processes these messages. I believe NinjaTrader does not process these messages at this time, but other charting applications do.
I am not defending IB data because I don't use it, but that is not a fair statement. I think It depends on how you trade. If I trade 50 range bars, and have 100 tick stops I doubt very much IB data will make a difference on if I am a successful trader or a losing trader.
