Which Bookmaker ?

Ladbrokes or Coral mate, they are stars.

Thanks YOMOMMA. I did think Ladbrokes. Do people think it's worth adding as a criteria for a system to only take higher odds than Laddies is offering?

Agree re Ladbrokes, however they usually price to a higher margin than many of their competitors which makes it easier not to get it wrong! Which also results in a system with a criteria to only take higher odds than they are offering, being a fairly neglible cruteria as it will not often be the case that they are top price!

pinnacle are decent too

What do you mean by 'most accurate'?
Who decides which is 'most accurate'?

None of them are any good at pricing up horses but the ones that price up earliest by logic get it most wrong.