more like 18-22 players available with first round grades, other teams might have 24 players that they grade at a first round selection, no team has the same value on players.......If you have four players still available at 24 you value as a first round grade, and you can move back and still get one of those players, you do it, Dallas doesn't have a fourth round pick....Well, that's exactly what happened with Micah Parsons, Dallas traded back two spots and still got Parsons and another draft pick.....Travis Fredericks was a trade back and got a third round selection...Dallas has many holes to fill, 2OL, rb, DT, CB, S, 2 LB's, so to fill those holes, you might be presented with a trade deal you can't pass up because you need so many positions and not a lot of picks.