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Originally Posted by Triple_R
Is it "1 point = 1 (presumed) sale" or is it more complicated than that? I get your other points, and they're well-stated and reflect the impression I've already had, but I've never quite understood how the points work exactly.
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Yeah, rank over time gives points, and points are like estimated sales so far. They can also give an estimate of the final point tally, but this is extremely subject to swings and variation (since it can only assume that past performance will continue as-is until the end, which rarely happens). In the end, calling it "points" helps people remember that these are only predictive algorithms (based on one single store, even if it's a big one), and no actual sales are known until the Oricon releases numbers after the fact (and even then, Oricon doesn't catch absolutely everything either).