main chart window autoscale

 
The autoscale feature of the main chart window seems to ignore the min-/max- values of attached indicators.
What is the best way to "keep" all drawn lines/charts of attached indicators to be visibile on the main chart ?


ChartSetDouble() 

- CHART_PRICE_MIN
- CHART_PRICE_MAX
are readonly values

- CHART_FIXED_MIN
- CHART_FIXED_MAX
might be a solution, but then it is not "autoscale" anymore

Any hints are appreciated.

best regards.