@djabornig,
Thanks for reporting the use case. It looks like a bug, we will look into this in future releases. Setting axis-Y range using minimum and maximum according to your data, seem to be working fine as shown in the code snippet below,
axisY: {
minimum: -0.09,
maximum: -0.01
}
Please take a look at the updated JSFiddle for an working example on the same.
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Sachin Bisht
Team CanvasJS