Future value is the amount that will be paid out if the predicted outcome occurs. This amount is determined directly from the price (probability) of the outcome and the quantity purchased. The lower the probability, the higher the future value or payout potential. (higher risk, higher reward)
Player A buys 100 units of Away Team Wins at 65% probability for $100 with a FV of $153.80
Player B buys 100 units of Home Team Wins at 35% probability for $100 with a FV of $286.00
As you can see, Player A’s purchases the favorited team. As the probability of the Away team winning is more likely, there's a higher probability of the desired outcome, and a lower Future Value in comparison to Player B's purchase.