Why age matters so much in dynasty
In a dynasty league you keep players for years, so a trade is a bet on future production as much as on this season. Positions age differently. Running backs take the most hits and fade first, receivers last longer, and quarterbacks can stay productive well into their thirties. The calculator projects each player's next four seasons from his current level with a position-specific age curve, so a young player still growing into his role gains value and a veteran near the cliff loses it.
Contenders and rebuilders
A fair value trade can still be right for one team and wrong for the other. If you are chasing a title this year, switch the league type to Redraft to see this season's value alone: if you win that view and the dynasty view is close, the deal fits a contender. Rebuilding teams should look at the opposite pattern.
See every player in order on the dynasty rankings, or check this season's numbers with the trade analyzer.