Team X current tie average this season is 1/3 and bookmaker A offers 5.1. Would you take this bet based on the fact it provides value? 1/4 > 1/3 = profit of 1.1 unit over the course of 4 bets
I would need more information.
What is the bet being offered, and what does "5.1" mean?
The bet is team x and y to tie.
Odds of 5.1 means a bet will return 5.1 multiplied by the original stake for a total profit of 4.1.
1 unit x 5.1 = 5.1 - 1 = 4.1
In this case the value is +1.1 since team x has an average tie for this season of 1 in 3 games.
Think of the "value" in value betting as a hypothesis based on historical data.