Bug 481395

SUMMARY
When selecting Automatic Y Data Range for my temp sensor line chart the program picks Y values that aren't as helpful as they could be. 

Example 1 - 
Chart created to track system temps other than CPU. Temps hold steady from 25C to 45C and Automatic Y Data Range chooses -273C  (which is about a tenth of a degree above absolute zero) to 85C. 

Example 2 -
Chart created to track CPU temps. Temps are at around 45C to 60C and Automatic Y Data Range chooses 0C to 56C, sometimes clipping the top of the graph when temps hit 60 very briefly. 

I would expect the functionally of this option to choose a Y value 5-10 degrees above the highest temp value recorded in the past 5 or so minutes and a Y value 5-10 degrees below the lowest temp value recorded in the past 5 or so minutes. I think that might be a better framework to have for this functionality.

Thanks!


SOFTWARE/OS VERSIONS
Operating System: Debian GNU/Linux 12
KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.107.0
Qt Version: 5.15.10
Kernel Version: 6.6.13-amd64 (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i5-8250U CPU @ 1.60GHz
Memory: 15.4 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620
Manufacturer: Dell Inc.
Product Name: Inspiron 7573

ADDITIONAL INFORMATION