hi barny
Once you have your set of rules in place you will then have to sit tight, recording all the bets using the exact same rules.
After a several hundred or 1.000 bets if possible you can then go back in time to make the necessary improvements.
Any alterations will then become a new system thus the testing and recording starts all over again.
The things we punters do to find the elusive pot of gold so to speak.
cheers
garyf