This means that the Sportsbook believes that the Houston Texans are more likely to win the match. Let’s use an example by looking at t match between Houston Texans and the Jacksonville Jaguars. The negative symbol means that the team is the favorite to win. When you see a positive or plus in front of the odd, it means that team is considered the underdog, or least likely team to win that match, by the sportsbook. First it is important to understand that the positive and negative before the umber are vitally important.