Quote:
Originally posted by tcatron565
Where did you get this from?!  Did you make this yourself?! Wow! |
Yes I have been posting it every day for the past month
Worldwide chart methodology:
It uses the iTunes top songs chart of 23 countries. Each country has the same weight. To calculate the points, the following formula is used: pts = exp(-0.02 * (x-1))*1000 rounded to the nearest integer, where x is the iTunes position. In numbers, this means:
#1 = 1000
#2 = 980
#10 = 835
#20 = 684
#30 = 560
#50 = 375
#100 = 138
#150 = 51
#200 = 19
And quickly becomes negligible for very low positions. Only the highest charting version of a song counts. Because there are 23 countries, the theoretical maximum is 23000 points, which happens when a song is #1 in each country.
Quote:
Originally posted by thewaitinggame
i've always wondered what exactly are the "pts" representative of or calucated from?
|
They are a sales estimate. It's not perfect because it doesn't catch weeks where songs sell 300K+ and it doesn't catch the overall fluctuation in the market (some weeks overall sales are higher than others).
I use the following weekly sales numbers per position:
#1 250000
#2 195000
#3 172500
#4 155000
#5 145000
...
#10 95000
#11 80000
...
#21 51750
...
#41 33500
...
#61 25500
...
#101 16000
...
#201 8000
...
#401 4000
...
#1001 1000
So one day at #1 is 250000/7 = 35714 estimated sales.
There's going to be another video?
, hopefully she'll sell enough for a top 20 debut.
