Quote:
Originally Posted by GirlySports
How far in time do the rankings go back? 2 years?
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Just before the 2018 World Cup FIFA switched to an ELO-based system so there is no more expiration or devaluation of points over time. Basically they took the ranking table as of some date in 2018, gave the top team a starting value of 1600 points and each place below that 4 fewer points and then since that time the points are added/subtracted based on each game.
The formula is:
new points = old points + Importance * (Result - Expected Result)
Importance = 5 points for a friendly outside the international windows up to 60 for the World Cup playoffs. 10 for a normal friendly and 25 for confederation or World Cup qualifying are the ones we're seeing right now. Gold Cup was 35 prior to the quarter final and then 40 after that.
Result = 1 for a win, 0.75 for a shoot-out win, 0.5 for a shoot-out loss or tie, 0 for a loss
Expected Result = 1/ 10^(-(your points - opponent points) / 600)+1)
(I just learned that you can't lose points in the knockout stage of a competition, so Canada losing to Haiti didn't cause us to lose points only to miss out on gaining a bunch)