I've seen it a couple times in the last weeks and its in the OP of this thread as well, so I thought I could clear this up in case people are misunderstanding this: The percentage an object has risen in the Movers & Shakers chart has nothing to do with the actual sales increase, the percentage shows the rank increase.
Don't believe me? Try it yourself, the percentage is calculated using this equation: ((old rank/new rank)-1)*100%
So PS4 sales did not increase 1400% in the last 4 hours.







