According to Malcolm Knowles in one of his earlier publication there is a high correlation between the rankings of the pre post market and the SP market.
Maybe not the actual price but the order in which the horses are rated. He even gives a pre post to SP conversion table and reckons it's pretty accurate.

Would you take IAS prices as being pretty spot on...or as close as you're going to get anyway?

If you want tomorrows prepost tonight (Most newspapers) go to

http://www.**************.com.au/ and click on formguides.

Cheers.
Enjay

Your right about those pre-post rankings .

The interesting stat was using the pre-post market to calculate quinella divs.

It was amazingly close to the actual TAB payout figures.

The top 5 SR in the pre-post was within 5% of the final TAB SR.
That's better than most subscription services.

Thorns, coincidentally I was just looking at that since this thread began - try PA forum search for Midweek tactic - verrrry interesting.
cheers..........Mancunian

Thats the thread I remembered. Cheers for that Mancunian. I wonder how that method goes since that was posted years ago.

I had a go on paper today - looks promising,will put in report later tonight.

Ref. "Midweek tactic"
First look - results for today, using my interpretion of the guidelines.
Basically looking at all races except 2 that only had 6 starters
Ballina - 7 races - outlay $699 return $739.20
W'bool - 7 races - outlay $699 return $722.10
If eliminating those races where the profit looked to be less than 20%
Ballina - 4 races = out $400 return $327.10
W'bool - 4 races = out $400 return $499.20
Total out $800 return $826.30
Here we go again, another promising system that may turn out to be about break even (or slightly below)
BUT - Ballina was a heavy track and I wouldn't have been putting money on.
AND - I wasn't necessarily following the rules precisely.
I got the IAS prices, to establish the top 4 selections, then Dutched those horses using S/TAB (which is the only place I've got money currently).
Its close enough to encourage another look or two to see how it performs.
May not have much time in the next few days, but will keep in touch with anything further.
Cheers.......Mancunian

I tried a search for that thread on PA but could not find it .

Would it be possible for someone to give us the page number.

Go to Horse Racing Forum. Click on search. Type in"midweek AND tactic".

Further thoughts on this as I progress with some data, at first sights it seems logical i.e. the "book" is usually
around 120% so back the first 4 only at least 20% over and you can't lose eh? eventually.

But it's starting to remind me of a plan that I used for a while with pre-post favs, i.e. overall they (PP Favs.) showed a
loss of around 10%, with an average price of (from memory) of around 2-1, so the idea was to only back em' when you
could get at least 5-2, seems logical,.......... er....... problem was I started to show an INCREASED LOT. Didn't take
too long to realise that the higher the price the lower the S/R and so the greater the LOT.

I haven't quite figured out if the case will be the same with this one but I suspect it will (unfortunately)

One thing though, using the same idea, but backing on Wed/Sat with bet fair SP & with your Min. price stipulation,
(as explained by Bhagwan)
that would take a lot of the work out of it and in a better pool may just tilt it the right way.