When will the auto (scale and level) be included in the code? or maybe I'm missing some other indicators that the present code calls.
How can you optimize on a parameter other than Price?

Auto level is there as described - it sets the level to the price of the left-most bar of the chart. That's why the slider for Level says "(disabled)". Your job is to adjust Scale so that the plot follows price as closely as possible for the left side of the chart.

As far as I'm aware, you can't optimize with this indicator at all; it's completely visual. For that reason it might be useful for discretionary trading, but it would be very difficult to make sense of this thing for backtesting.