Board Thread:Game Discussion/@comment-11490363-20131118012208/@comment-11482499-20131118024430

It seems to be the min/max of who you'll be matched up against. Everyone in that rank is ranked from 0 to 100th percentile.

It explains why it gets easier to run a streak later in the event, as weaker decks have finally clawed their way into the upper ranks and dilute the pool.

For example, early in the event, at the top rank by Streak 3 I'd be seeing mostly-R5 decks. Now, I mostly see Getaway / Darkwing /evo2 decks at the early streaks, and don't see all R5 decks till maybe 11-12.