Does anyone have any ideas for converting QTAB ratings into odds? I think this topic may have been mentioned before but I cant seem to find it.

Well, the first step is to find a conversion chart suitable for using with the ratings. Don Scott's was very good and this one that I use is sort of similar to his. My conversion chart is actually for weight ratings though. It goes down in 0.5kg lots and only goes to 10 kgs below the top rated, so I'm not actually sure it will work all that well on these Unitab ratings. I'll give it a try though.

Top rated horse = 100 pts
0.5 kgs below = 85 pts
1.0 kg below = 70 pts
1.5 kgs below = 60 pts
2.0 kgs below = 50 pts
2.5 kgs below = 44 pts
3.0 kgs below = 38 pts
3.5 kgs below = 33 pts
4.0 kgs below = 28 pts
4.5 kgs below = 24 pts
5.0 kgs below = 20 pts
5.5 kgs below = 17 pts
6.0 kgs below = 14 pts
6.5 kgs below = 12 pts
7.0 kgs below = 10 pts
7.5 kgs below = 8 pts
8.0 kgs below = 6 pts
8.5 kgs below = 4 pts
9.0 kgs below = 3 pts
9.5 kgs below = 2 pts
10.0 kgs below = 1 pt

Now to use it on a race. Here's Echuca Race 9 from today's racing:

1 Kelthorpe Rtg 100, 100 pts
2 Emitella Rtg 96, 28 pts
3 Al Bahar Rtg 98, 50 pts
4 Lord Hatton Rtg 95, 20 pts
5 Sarah Michelle Rtg 96, 28 pts
6 Young Maverick Rtg 89, -
7 Kidancho's Reign Rtg 91, 3 pts
8 Kiss And Fly Rtg 95, 20 pts
9 What's It To You Rtg 98, 50 pts
10 Flanigan Rtg 93, 10 pts
11 Mcguiness Lane Rtg 85, -

Now, you simply add up all the scores and you get a total of 309 pts. Then simply divide 309 by each runner's score and you get an approximate dividend for that runner. Of course, you will usually have to do some rounding up or down to make the dividends more realistic. Kelthorpe was easy: 309 divided by 100 is 3.09. Round that up and you get $3.10. I couldn't get odds for two of the runners because they were rated too far below Kelthorpe.

1 Kelthorpe $3.10
2 Emitella $11.00
3 Al Bahar $6.20
4 Lord Hatton $15.50
5 Sarah Michelle $11.00
6 Young Maverick -
7 Kidancho's Reign $103.00
8 Kiss And Fly $15.50
9 What's It To You $6.20
10 Flanigan $30.90
11 Mcguiness Lane -

Of course, that is a 100% market. If you actually want a market to compare with the TAB prices, then you really should multiply that 309 figure by 0.85 to take into account the TAB's tax takeout. If you do that, you get 263. Then divide 263 by each runner's score and you'll get a price which will give you a better comparison with TAB odds.

1 Kelthorpe $2.60
2 Emitella $9.40
3 Al Bahar $5.30
4 Lord Hatton $13.20
5 Sarah Michelle $9.40
6 Young Maverick -
7 Kidancho's Reign $87.70
8 Kiss And Fly $13.20
9 What's It To You $5.30
10 Flanigan $26.30
11 Mcguiness Lane -

There you go. Tell me what you think. Someone on here probably has a much more suitable way of doing it. Personally, I think this way is nice and simple and it suits me fine. :smile:

[ This Message was edited by: sportznut on 2004-02-05 17:54 ]

that's da formula.



[ This Message was edited by: puntz on 2004-02-14 04:14 ]

Thanks sportz, I'll give it a try on some past results and see how it goes.

I don't have the book or the info. Just a question.

Dr Ron. You are from Vic. So am I. But I gather you use the QTAB ratings rather than those on-line at the Vic TAB now. So do I. Is it because you really find them more accurate and useful?

Readers of this forum will know that most of my systems (or attempts) employ the QTAB ratings. I lose faith in them now and then but in the end I find they save me lots of work and are very useful.

Does anyone have any comparative figures on the success of the QTAB ratings compared to other ratings systems around, like Mark Reads, the ones on Vic TAB, etc. I compare them sometimes. Often major differences - and I usually stick with the QTAB.

You mention Don Scott. Somewhere (this forum?) I heard that the QTAB ratings (AAP) employ Don's Scott's ratings methods. Is that true?

Thanks for those conversion tables. With a bit of fiddling it works fine.

Hermes

Hermes, I dont think it makes alot of difference which ratings you use. They all have their ups and downs. I would prefer to do my own, but with 3kids under 10 and a diploma to complete, as well as work, there just isnt enough hours in the day. I only chose the qtab ratings because I find the site easy to use. I happen to think that staking is just as important as the selection process. My secret is not to try and win what I,ve lost in ten bets back in one or two. If youre having a bad day then things just get alot worse.