In the configuration screen of your gadget, under the "More Settings" section, you can set a fixed maximum y-axis value or leave it at the default "Auto" setting. The "Auto" setting will automatically determine the maximum y-axis value for each chart based on its respective data.
When considering the use of the ‘Fixed Value' option exercise caution, as improper configuration may result in data being cut off from your chart. It’s important to take into account the specific metric values when making this adjustment.
https://www.youtube.com/watch?v=Vg-h1r5ZzI0&list=PLm4bOt5Rgclg_UAQQsg1Q-ylKfb_INSO7&index=3