That's not how I call it. I call it when I see it, and I can usually tell within a minute or two if I'm going to have to call it. Players that carry usually habitually dribble that way and come close a lot. If I call it early and he's wide open, it's gonna be blatant. I've called a few this year, and without fail the kid complained to his coach only to get, "He's right, it was a carry," from his coach.
