ELO Decay

ELO decays over time when you're above 1400 ELO:


 * Elo is decayed after 3 weeks of inactivity


 * For normal rating, inactivity is defined as no activity in any queue


 * For ranked rating, inactivity is defined as no activity in the specific queue (arranged 5x5, arranged 3x3, and solo 5x5 are all tracked separately)

Elo decays at a rate of 25 per week for both normal and ranked ratings


 * Elo will not decay below a rating of 1400

155.56.68.214 12:58, August 30, 2011 (UTC)

http://na.leagueoflegends.com/board/showthread.php?p=12775704#post12775704