Well most "systems" are based on past statistics which are just that, Past! there's no saying that the future will perform as the past ask the farmers and see if rainfall lives up to statictics..

If there's one thing I know for sure it that horses cannot read the tote board and figure out where they're supposed to finish and no horse was ever good a statistical maths...

They hate stats too... after all they're only human..

Kind Regards
OzPunter