Here's a quick example of a possible scenario where we're now on the clock for your our pick, and we need to analyze what makes the best pick:

Let's take a look at everything the grid is telling us in one snapshot as we consider our third round pick:
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The first player in our lap looks like a no-brainer: Troy Tulowitzki
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You can see by the absence of purple cells for the next 5 rounds there aren't any good SS options
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The +3 tells you that he has already slipped 3 picks from his average position
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The green arrow tells you that you've personally tabbed him as having good value for his draft position
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You can see that "Tulo" might kick off a run of the last good SS -- by your next pick they'll be gone for sure. Might as well get on board first and start boxing in your opponents to consider an SS -- and one less well-rounded than Tulo at that!
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Looking at your team, you now have solid power, RBI, average, runs, even decent steals. You're not boxed in to getting a certain stat next pick
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You see that the other thin positions of Catcher and 2B still have a couple1st and 2nd tier options available for your next couple picks -- but not your very next pick.
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You see that you can instead afford to grab a top SP on your very next pick: At least one of Carpenter, Wainright, and Santana ought to be there.
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You can see the draft unfolding nicely to where you're filling scarce positions right on schedule, but also balancing your team's stats.
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If runs start to develop, you'll instantly and visually see the dynamics changing and be in a position to alter your strategy on the fly.
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So hopefully you can see how the grid is miles ahead of magazines, lists, or even online draft rooms.