I've been reading various threads here relating to DOMs compatible with Interactive Brokers. I've also been visiting the websites of some of their vendors and reading up about them. I can see immediately how they would be invaluable if one were trading off of tick charts, multi-second, or 1 minute bars. I'm wondering though whether folks here who have significant experience using DOMs feel there's a point, as measured by the time frames one is evaluating (e.g., 5, 10, 15, 30 minute bars, daily bars), where they become overkill. Any thinking on this from experienced DOM users would be greatly appreciated. So that you'll know, I typically trade very liquid stocks (> $20 million avg. $ volume per day) and am generally evaluating 5 - 15 minute bars/candles in making my entry and exit decisions. Look forward to your replies.