The player's header area is where you will look for and select the specific player you want to study.
You may also choose a specific cardroom (PokerStars or Winamax) and a type of game (MTT or Cash).
The number of hands played by the player is displayed along with the number of hands whose 2 cards are known.
Those info are consistent with the player's seat and stack and the #players in the hands as specified in the Control zone.
A 5-stars control displays a player rating based on the current selection of hands.
This rating has no other ambition as to provide a quick idea of the player's level, based on the player's ROI (BB per 100 hands) and is computed as follows:
5 stars: roi > 100 BB / 100 hands
4 stars: roi > 50 BB / 100 hands
3 stars: roi > 25 BB / 100 hands
2 stars: roi > 0 BB / 100 handsÂ
1 star: roi > -10 BB / 100 hands