• Odds ratings (like -12 or +7):
  This is a 100% mathematical calculation about odds. All odds from the past are considered which leads to "expected odds".
  If odds ratings are negative (like -14 or -21), we get good odds on home team (compared to the past).
  If odds ratings are positive (like +12 or +18), we get good odds on away team (compared to the past).
  A higher number means more value than a lower number.
  
  
• Lineup ratings (like ∅ 43 or ∅ 39):
  It simply shows strenght of a team which consists of 11 players.
  All 11 players have a strength rating and the average is the team rating.
  You can check lineup ratings for expected lineup (grey) and confirmed live lineup (red).

Conclusion: On this site you can see both (!) sides of the medal.
You can check if your team is strong enough. But you can ALSO check if you get acceptable odds this round (compared to all the odds from the past for this team).