I have seen my live Zs take great runs up and then give a lot of it back. Overall I have decided two things. The first is to set my Margin slider (i.e. risk) to a value low enough so that I can handle the ups and downs. But really this feeds into a trader psychology situation which I continuously work on. Trading is an inconsistent game and not many people have the mentality to handle it.
And secondly, I am planning to leave my account trade away for a year before making any serious decisions on continuing with Zs. When I look at the equity curves, they are in a healthy profit after any one year period. So I think that is a good length of time. In mean time, I plan to continue working on my own systems.
But Sundance points, drawdowns occur and you have to wait some time before you can extract profits and expect to stay above the break even line.