I've seen a few posts relating to the price files found here:
http://data.betfair.com/
I made up a sheet last year that sorts out the data once you've downloaded a file (UK win only files).
It gradually builds up into a database that you can analyse by year/month/day/week/racetype/course/runners, betting position of winner etc.
Once you've downloaded a file you can navigate to it and load it into the programe.
There are 2 sheet with pivot tables on them showing the traded volume by course and racetype and the favourite win rate by course and racetype. The info for these no longer exists, (original database deleted), but what you can see is still valid
I haven't put a button on any sheet so you'll have to run it manually. Before you do so however, make sure to delete any info in the unique values sheet,and the database sheet (everything else should take care of itself, but haven't used it for a while myself). If you try to download the same file twice, you will be told that it already exists and will not be added.
Cheers,Nigel
PS Had to delete a couple of pivots as the file size was to big.