A valuation system determines a win probability, which is a measure of the likelihood a participant in a particular game is to win the game given a current game state. The valuation system may determine the win probability from an analysis of events that have occurred in actual games that have occurred over a predetermined time period in the past. The valuation system may then provide the win probability to various media outlets for display or broadcast, for example, within the context of the game. The valuation system may also display or broadcast the win probability through its own broadcast source, such as its web site.