(Enhancement suggest) Min and Max from attributes

[SiriosDev]

may I suggest the possibility of taking maximum and minimum values from attributes (perhaps with templates)?

example use case: set max from attribute to create a gauge for storage disk space monitoring

[coleburg]

+1 this,

I have agile prices, I would like to be able to use max as {{states('sensor.agile_max_rate')}} for example.

[turboc1208]

+1 this, I am tracking the number of zwave devices on an electrical circuit in the house and then graphing the number of unresponsive devices. I need these to be entities. I want to use helper controls to set the min, max and template values for each gauge.