Add functionality for the chart

[vde69]

Add 2 parameters “min” and “max” for guaranteed range display.
For example:
I want to always see the temperature range from +15 to +30 degrees Celsius on the graph, even if it was constant at 22 degrees during the reporting period,
but if the temperature drops below the min I specified at +15 degrees (for example +5), then the temperature range of the graph adapts and becomes from +5 to +30

[tom_l]

Closing as a duplicate. Please vote and comment here:

Optional fixed limits for history graphs

Currently all of the history graphs auto scale, but for items such as wind direction, it make little sense to auto scale down to +/- 5 degrees. I would prefer in that case of a fixed scale 0-360 degrees. The option of settomg a fixed scaling would allow use of an ailing sensor with wild data points (ie 85C for the w1thermsensor). The feature request is for a scaling option autoscale or fixed with high/low limits.