It is correct. You want from the app to make you a linear balance line and it is so good to make one for you.
The stability means exactly stability, not profitability. The max score 100 means that the strategy balance line is close to the straight line. it has absolutely no relation with the direction of the line.
In order to prevent such cases, it was a hard coded requirement for minimum profit of 0.00001. However there were users that very VERY heavy requested to remove it. So I moved it to the Acceptance Criteria and set it to be a default value.
EA Studio does exactly what you want. In that case, you remove the positive profit requirement and the program knows that you don't care for it.
-99 must mean that the balance line is completely opposite to a straight line, what ever shape would be that - a circle !?