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Message: <blockquote data-quote="Porridge" data-source="post: 7981471" data-attributes="member: 7020143">I'm a little confused by this "divergence in Amazon data" for 5e and PF2 people are trying to explain. Their ranking trajectories mirror each other pretty closely, and the big picture changes in rankings all seem to have pretty straightforward explanations. So, looking at the daily tracker here <a href="https://www.profitguru.com/calculator/sales" target="_blank">Amazon Sales Estimator - Estimate Monthly Sales Volume per Product</a> and focusing on 2020, we see the following pictures:Core PF2: <ol> <li data-xf-list-type="ol">Up until March 13th: PF2 generally bounces around in the 2000-6000 range (averaging about 4000).</li> <li data-xf-list-type="ol">March 14th until April 10th: PF2 craters, generally bouncing around in the 5000-10000 range (averaging about 7500), hitting rock bottom on March 24th-25th, then recovering slightly.</li> <li data-xf-list-type="ol">Today: Currently at 3795 (as high as it's been in ages), but this is an unreliable figure (since it hasn't accumulated a full day of data yet).</li> </ol>5e PHB:<ol> <li data-xf-list-type="ol">Up until March 13th: 5e generally bounces around in the 20-70 range (averaging about 45). </li> <li data-xf-list-type="ol">March 14th until April 28th: 5e craters, generally bouncing around in the 120-300 range (averaging about 210), hitting rock bottom on March 24th-25th, then recovering slightly.</li> <li data-xf-list-type="ol">April 29th and 30th: 5e has a massive sale, shoots up into the 20s.</li> <li data-xf-list-type="ol">May 1st-May 4th: Sale ends, 5e descends into the 70s.</li> <li data-xf-list-type="ol">Today: Currently at 118, but this is an unreliable figure (since it hasn't accumulated a full day of data yet).</li> </ol>Big-picture-wise, the trends of track each other pretty closely. Sales were pretty constant until March 13th, then they cratered (presumably due to coronavirus and economic downturn worries). The big difference, of course, is the spike 5e had with its massive sale the last couple days of April, but that's easy to explain. And Amazon's rankings appear to use some kind of time decay function (though the exact details are proprietary information), so you'd expect that spike to pull up the 5e ranking for a little while, which is again what we've seen.So what else needs explaining?... I mean, I guess there's the big difference in ranking at the moment of writing (with 5e falling and PF2 rising), but that's too noisy to take seriously (since it hasn't accumulated a full day of data yet).</blockquote>

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