Benny, I'm currently testing a laying system which has so far been very profitable - 46 successes from 50 races.

My cut-off price is $6.80 and I bet level stakes. However if it continues I intend to apply a stakings plan for higher profits, maybe 2% of the bank.

2.5% of your bank is $25, therefore your max libility with a cut-off price of $5.00 is $100 which would reduce your bank by 10%. Personally I would test the system (I assume you haven't?) with a much smaller stake until you are confident the method is successful. Only then would I think of a stakings plan of a percentage of the bank.

But of course, everyone's different, and my conservatism may not be preferable with other layers.