Scoring
How Songs Score
Every song scores on two things: where it finishes on the chart, and how it got there.
Position Points come from where the song lands when the new chart drops. Finishing at #1 is worth about 40 points, #50 about 20, and #100 almost nothing.
Movement Points are then added or taken away:

Climbing pays a bonus that grows with the size of the jump, and pays more when a climb like that is rare from where the song started — #50 to #1 is worth far more than #2 to #1.

Holding your position pays at every rank. Staying put is worth points.

Slipping costs you, and the further a song falls the more it costs.

Falling off the chart is the worst outcome. It always costs more than surviving at #100, and it hurts most when a song drops out from high up.

Because songs lose points as well as earn them, a weekly score can be negative.
What That Looks Like
What the song did Roughly worth
Holds at #10 38
Climbs #20 → #10 52
Climbs #50 → #40 37
Slips #5 → #15 25
Slips #90 → #100 −9
Drops off the chart from the top 10 −63
Your weekly score is the total for every song in your playlist, plus any points your boosters earn.
Point Boosters
Boosters are 5¢ each and let you score points on songs you don't own. A different booster is available each day of the week, so check back daily.
Free Hit
Free Hit Wednesday
Score any song's points for 5¢, whether you own it or not.
Ice Cube
Ice Cube Thursday
Earn 1 point for every spot a song drops, up to 30. Falling off the chart counts as the biggest drop of all — your way of scoring on songs you don't like.
Heat Waves
Heat Waves Friday
Put a x1.25 multiplier on a song already in your playlist.
Rocket Man
Rocket Man Saturday
Pick a song currently outside the top 10. Earn 10 extra points if it finishes in the top 10.
Diamond Hands
Diamond Hands Sunday
Pick a song ranked in the top 75. Earn 15 points if it falls off the chart entirely.
Booster points are added on top of your song points, and a booster can never score you less than zero.
Madstackz is not affiliated with Billboard or the Billboard Hot 100.