What exactly are you looking at for using William Hill numbers?
If the toal number of tickets and total of money wagered have the same team....but the % of money is higher....take that team. But....I bet if you go back and look all season long there isn't much profit to be made. I did it at one point for 5 weeks and it was like 40-35. But....who knows. Maybe it works for the whole season. But.....I did it for both college and NFL. Maybe it works well with just NFL. Or maybe if it does it is a year trend and not something over the long haul. Couldn't say without endless hours of research. Even if the past years are posted. I once had a trend/system for a year that was 20-0....I then checked the previous two years and......after all three years it was barely over 50% in total. Play what you want at your own risk. I say use all info availale. Win lose or push is on you