Finish bonusFinishes earn more
KO/TKO = 1.20× K-factor. Submission = 1.15×. Decision = 1.0×.
Recency decayOld wins fade
Fights older than ~18 months count less. The K-factor decays exponentially.
Streak multiplierMomentum matters
A 3-fight win streak boosts K by 1.30×. A 2-fight skid boosts loss K by 1.35×.
Veteran scaleChampions are harder to move
After 20 fights, K drops to 0.8× — ratings of veterans move more slowly.
Velocity bonusActive = rewarded
Each of the last 12 months' fights adds 0.08× K (capped at 1.5×).
Inactivity decaySitting out costs
After 30 months out, ELO drifts back toward 1490 — career death.