There is nothing like real time testing....i have nothing against testing on paper and i know those that will test 1000s of races trends change and so do betting habits....get a bank together something you are comfortable with loseing and go for it....start out small...like $100 bank betting 2% if you can make a profit and maintain it then increase the bank and increase the bets.....this is the only way to know....many systems work great on paper but in the betting ring the punter is the one to fall apart.