I'm new to this game and collecting data still. I was wondering what experienced traders opinion was of the big ETFs in relation to the indexes themselves. I see more and more people using the Q's, DIA, SPY or the XL_'s to get general market or sector direction (up, down, sideways, trending or not, etc.). If someone wanted to look at a few chart to get a general idea of the situation, are the ETFs a good picture or they diverge too much of the time. Thanks in advance for the feedback.