take the number of goals the fans expect, work out the over/under 2.5 odds for that number = x, their wrong odds
work out the % chance they make it to go over 2.5 = y, the wrong %
find the percentage chance the market thinks there will be over 2.5 goals = z, the correct %
y-z=a, the difference in opinion measured as a %, if its a positive number then they think there will more goals than the market, if they think less then its negative.
multiply "a" by the total number of people polled, thats now our unit stake, its how wrong we think they are as a group.
we then feed it into the markets as a lay of either over 2.5 or under 2.5, depending on how many goals they think will be scored. if they think 2.67 goals then we lay overs at odds "x" from above, if they think 2.37 then we lay unders at x.
where our odds are bigger we get matched, where theyre smaller we dont, any matched bet is in my eyes always a value bet given im trying to lay higher odds that i know are wrong