SteveM, it all depends on what you are doing, I mean for long term profits from "investing" it's the Profit On Turnover of course.... BUT there is a case for aggressive staking plans designed to make a killing from those good runs and riding out the mediocre runs without too much damage, a quick example is my idea of betting 1/5 the bank never reducing, QUIT when there is insufficient funds for the next bet and start again. You will need the patience of a saint but sooner or later you'll hit that lucky run and make a heap! even though the plan overall may not even show a level stakes profit.