Damage, souls, last hits and objective damage per minute, deaths and accuracy — your 90-day averages against every player's matches. 50 is average, 90 means better than 90% of matches.
Share of wins adjusted for the number of games (with few matches it is pulled toward 50%). 50% wins is 50 points, 65% or more is 100.
Current rank: Initiate I is 0, Eternus VI is 100.
If a part is missing (e.g. no rank), it is skipped and the other weights are rescaled.
The rating appears after 10 matches. It is a LOCKSTAT estimate, not the game's internal rating.

You win 85% of matches on Graves — well above your average (56%). Played 13 matches.

Your win rate on Grey Talon is only 40% against an average of 56% (52 matches). This is an observation from your matches, not a verdict.
When you die fewer than 5 times your win rate is 83%; more — 35%.

With Cheat Death your win rate is 84% against an average of 56% (56 matches).
compared with the average player on the same heroes; the middle ring is average