beton, I'd never taken any notice of pre-post for many logical reasons. But the facts suggest that pre-post odds are an excellent filter. All the logical reasons you could put forward to discount using pre-post prices can be defeated with data suggesting otherwise.

There are arguments about the office boy doing the odds ..... there are arguments suggesting the papers generate their odds using data in a computer ..... there are arguments to suggest that the Pre-post odds are at 140%, and are bound to shorten when the market runs at 115% .....

Pre-post between $4 and $10, if they open shorter, is worthy of keeping data.