Having watched both the Qs and NQ over a long period of time, I don't think there's any question that NQ is the more reliable indicator both in terms of speed and accuracy. Sometimes the Island boys try to front-run the QQQs, giving an impression that they're ahead of the market, but they are wrong a fair percentage of the time when they do that. NQ is far less subject to the kinds of manipulation that market makers ---- even in a tracking stock ---- are sometimes trying to pull off. So either NQ is faster than QQQ or the QQQ prices are questionable and not necessarily indicative of true value. (And for trading purposes, in my view, NQ is a far superior instrument to the QQQs ---- much smaller spreads and significantly faster executions.)
