This is based on the same principle as the Favourites Index but the favourites are those printed first in the betting section below each race card in the Racing Post (i.e. the horses the Racing Post betting forecast predicts will start favourite).
These horses are awarded points as follows: 1st = 25points, 2nd = 10, 3rd = 5, any other place = 0. If there are joint favourites the first named horse in the Racing Post is deemed to be the favourite.
Here's an example. In a race meeting at Lingfield, Sporting Index's opening prediction for Racing Post Favourites might be 66-70. If you studied the Racing Post and believed their favourites had a better chance than they predicted you would bet high (buy) at 70 for £2.
In the end two of the Racing Post favourites won, but none of the others made the frame. So, on the basis of their scoring system, the market made up at 50. Had you gone high at 70 you would have lost 20 times your stake: (50 - 70) x your stake = -20 x £2 = -£40. However, if the Racing Post favourites index had resulted in 85 points, the same bet would have won you 15 times your stake: (85 - 70) x your stake = 15 x £2 = £30.