Start betting how much data do you want, 4 years is plenty. If you want to increase your pofit 10 to 30 % then get a Betfair account!!!!.

eg yesterday
Rosehill R3 #2 Synonym paid $2.30 on Unitab ($2.60 best odds?) bookmakers drifted out to 3's, betfiar $3.60. Last traded at $3.65 traded at $3.75 just before jump.

Cheers.