Odsonne Edouard's double making it four wins on the spin.The result may have a sting in the tail though as, with an 18 point gap it means the title could be decided in the third derby of the season.With 10 games remaining Celtic are on 61 points, and it doesn't take a mathematical genius to work out their maximum possible total is 91.With Rangers on 79 they need 12 points, or four wins to match that total.But after fixtures against Dundee United, Livingston and St Mirren they meet Celtic on