Pick an app. Each card is one of its current lines: the edge is how much more often the pick should win than the app's payout needs (PrizePicks' 6-pick flex needs about 54.3% a pick; apps that post their own odds use those).
The fair odds come from sportsbooks and prediction markets pricing the same player and stat, with their built-in fee removed. For props FanDuel and BetOnline count most, then Pinnacle and DraftKings; Bovada counts little. A ⚠ means no book posts that exact line (shifted from the nearest one) or no book prices it at all (the player's recent results instead).
CHECK LINE means ChalkEdge does not trust that card's edge yet, so it is not counted as +EV. It usually means the app and the sportsbook may be counting different things (for example different maps), only one less reliable book prices the player, or the edge is too big to be believable. These cards stay hidden unless you tick “Include estimates & checks”, never go into Build my slip, and each one says why. Check the line yourself before playing it.
How have these edges done? See the Edge Scorecard: every +EV card is tracked against the closing line and the result.