I'm an online poker pro, been analysing form guides and gambling on horses since age 8, this seemed like a logical progession

I'm exploring the concept of combining the legitimate ability to analyse form and the safety of green bets.
Essentially analyse each race, select horses I think will win, back them when odds are inflated, wait, lay bet on those that drop in price for a guaranteed profit, keep the bets on those that don't.
(Alternatively, lay those i think will lose, of those back the ones that drift)
Obviously stock trading purists will preach cut losses, gamblers the opposite.
Has anyone had success / failure this way?