In fantasy football, trade value describes how desirable a player is when you are trying to make a deal with another manager. A player's trade value comes from several things: how many points he scores, how consistent he is, how healthy he is, his age, and how many years he can help your team. A young star running back usually has much higher trade value than an aging veteran putting up similar numbers, because he can help a team for longer.
Trade value changes throughout the season. A player's value rises when he takes over a starting job, gets more touches, or sees his role grow. It falls when he gets hurt, loses work to a teammate, or plays badly for several weeks in a row. Managers who pay attention to these changes can buy low on struggling players or sell high on players who are overperforming, hoping to win deals by timing the market.
Many managers use trade charts, which list players in order of worth, to help decide if a deal is fair. These charts are a useful starting point, but the real value of any player depends on your own team. If you have plenty of wide receivers but need a running back, a running back is worth more to you than the chart says. League settings, like how many teams are in the league or whether it is a keeper or dynasty league, also shift a player's trade value.