score:2

Accepted answer

You can use minRange instead of max, as this will give the y-axis a small span when all values are 0, but adjust accordingly when larger values appear.

For example:

yAxis:{
    min: 0,
    minRange: 2
}

See this JSFiddle demonstration of how it adapts to updated points with larger values.

score:0

It's only like that because all your data is 0. Changing any of those values fixes your graph


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