I also think about Sociedad recent performance, they haven't been very consistent in collect points, even they lost against Valencia. You're right Cadiz sometimes make a surprises, but the head to head record seems to be an important point for me if want to bet on this match. Sociedad have a high chance of getting three points tonight, so I'll bet on Sociedad to Win, wish me luck. 
although Cadiz could surprise Sociedad. I also place a bet on Sociedad. the odds of winning are better than Cadiz or the best chance of Cadiz is a draw.since I also bet for Sociedad, good luck with our bets. because all that can make Cadiz win is their luck. they are not without odds but statistically, Sociedad is still the best for this bet.
Real Sociedad has been up and running in their performance this season which has put them in the 3rd position that they are in their league, despite the fact that in their recent games they haven't gotten much of points, however this will stand as a motivation for the team in trying to get the 3 points from their opponent in order to maintain their position and keep their fans happy once again. Whereas Cadiz is down the league table and still struggling, wining Sociedad is gonna be a tough one for them due to their past meeting records with the opponent.