Work Bitch's Pop Airplay Chart Run (so far.)
How It WorksNext to the date of the update is the position on the chart. Under that is spins, AI, and total spins.
Because it's a 7 day rolling chart, starting with the song's second week, I put how many spins the song got and the AI gained off of those spins in parentheses under the normal update. This is figured out by comparing the update to the same day a week ago, which is how the airplay chart figures out its updates.
For example: Work Bitch
Mon - Sept 23 - #25
+002 spins -2.208 AI (3489)
(500 spins +3.843 AI)
_______________________
With the rolling chart format, the song essentially "loses" the spins and AI from the same day a week ago. So to get a net gain of +2 spins and net loss of -2.208 million AI, Work Bitch would have had to get 3.843 million AI off of 500 spins (because it loses 498 spins and 6.051 million AI.)
Mon Sept 23 +002 spins -2.208 AI
Mon Sept 16 +498 spins. +6.051 AI
--------------------------
500 spins +3.843 AI
Finally, the rolling spin "totals" are figured out the same way. They add the spin update to the total number of spins from the day before. On Sunday Sept 22, her total spins were at 3487. Because she had a net gain of 2 spins on Monday Sept 23 (over her comp from a week ago) her total spins go from 3487 to 3489 (again, she loses the 498 spins from Monday Sept 16, but gains 500 spins from Monday Sept 23, resulting in the +2 spins.)
Hope that all made sense. Here goes:
Work Bitch - Pop Radio Airplay
Mon - Sept 16 - #46
+498 spins +6.051 AI (498 total)
Tue - Sept 17 - #35
+1014 spins +9.574 AI (1512 total)
Wed - Sept 18 - #32
+318 spins +2.356 AI (1830 total)
Thur - Sept 19 - #31
+351 spins +2.520 AI (2181 total)
Fri - Sept 20 - #28
+430 spins +3.278 AI (2611 total)
Sat - Sept 21 - #26
+426 spins +2.900 AI (3037 total)
Sun - Sept 22 - #25
+450 spins +3.066 AI (3487 total)
Mon - Sept 23 - #25
+002 spins -2.208 AI (3489 total)
(500 spins +3.843 AI)
Tue - Sept 24 - #28
-592 spins -6.528 AI (2897 total)
(422 spins +3.046 AI)
Wed - Sept 25 - #27
+179 spins +0.929 AI (3076 total)
(497 spins +3.285 AI)
Thur - Sept 26 - #25
+179 spins +1.112 AI (3255 total)
(530 spins +3.632 AI)
