You should set a 'difference limit' below which you do not bet. In order to arrive at this 'difference limit' simply divide the spread volatility by a number which produces the desired frequency of spread bets. For instance if you wanted to restrict your spread betting to the best opportunities you could divide the spread volatility by 3. To produce a reasonable number of spread bets each week we would recommend that you divide the spread volatility by 4. If you require a larger number of spread bets then divide the volatility of the spread by 5.
Lets take an example.
Divide this volatility by 4 and you get 4.8. This means that the Sporting, William Hill or IG Index mini performance spread must deviate from the Soccer Spreads rating by at least 4.8 points before you place a bet. The volatility of the Spreadex mini performance for the Premiership is 21.0, dividing this by 4 gives 5.3. Lets take another example of this calculation. Say you would normally bet 7 on the bookings index market for a Division One game when the spread difference was 5.9.