Rayo Vallecano's home advantage at 46.51% probability combined with typical home fortress performance suggests backing the home side. The 2.15 odds offer value given their home record strength and Real Sociedad's traveling challenges.

Despite 55.56% probability for both teams scoring, the defensive capabilities of both sides suggest a tighter contest. At 1.95 odds, a low-scoring Rayo victory (1-0 or 2-0) represents realistic scenarios where Sociedad struggles to break down a determined home defense.

The Under 2.5 market at approximately 54% probability reflects conservative goal expectations. With typical La Liga mid-table fixtures producing 2-3 goals, backing Under 2.5 at 1.85 odds balances value with realistic match outcomes where either team won't overwhelm their opponent.