Thanks jcl.

I understand the non-linearity. I was rather trying to get at 2 other points:

a) The volatility of Z3's Tests at different Margin values is greater now than it has been in the past. (I.e., its "VIX" as opposed to its trend.)

b) Because of a), using the Test results of a single Margin point (50) does not truly reflect how Z3 is expected to perform. In the case of the 1.58 Z3, the expected performance is actually lower than the Margin=50 Test results; but in future versions it could conceivably be higher.

Is this a correct perception & understanding?

Or are you saying that in Real Trading of 1.58 Z3 one should expect substantially better results using Margin=50 than if one used Margin=49 or Margin=51?

Thanks.