Jets +3.5 this weekend and only 39% of tickets are on the Jets but 76% of the money is on them, which is a 37% difference. So that tells me the Sharps have placed big bets on the Jets already
When you combine that with positive line movement for that team ie line moves in favor of that team, that’s considered a sharp play. I’d also recommend looking into reverse line movement
Keep in mind though, once the line has moved significantly, there may not be value on that bet anymore.