IAS prices
 

I find these prices reliable indicators.

Does anybody have a winning system using opening prices as the main guideline?

Betchoice are more accurate, IAS can be funny at times.

Thanks Shaun will check them, I see it is run by Colin Tidy I remember from back in the day he had talent:)

IAS use Mark Read's ratings and then money movements.
Betchoice use bookie track odds.

That's why the difference.