Bhagwan, I don't have hard and fast rules (yet) when identifying qualifying races and selections.

However, there are filters - the minimum runners per race is 9, the max is 16, the max distance is 1,650 metres and every horse in the race must have had at least three starts. I try to pick those races that would have a Betfair fave of a minimum price of $4.00. I've found in these races that the winner very often comes from those in a price range of $7 to $30. I experimented with these races by betting level stakes on each horse in this price range, and over an acceptable period it was showing a small profit. Some of the winners paid double the TAB divvy and almost every one exceeded the TAB divvy. In fact, I can only remember two (after Betfair's 5% takeout) that paid less than the TAB.

Then a couple of weeks ago I wanted to identify these races from the pre-post market so that I no longer had to sit at my 'puter waiting for qualifying races. I use the market in the Telegraph but at the moment it is still a matter of opinion to identify the qualifying races and the selections.

Out of interest I compared the results over the past few days using Unitab and Betfair dividends. For the past 31 races there were 207 selections - Unitab returned $217 (not a losing result) but the return on Betfair (includes 5% takeout) was $247.77. For one reason or another I was not able to bet on all the qualifying races and these are not reflected in the above result, which is a pity because there were a few double-priced winners.

Anyway, it looks promising, especially with Betfair's superior prices. And I would not be surprised if their S.P. market would provide a better bottom line.