Hello jahnvi25,
We appreciate you reaching out to us!
To create a chart like you requested you can add the same data to three series, the first is a type of line, second and third are a type of area. Then in area series, you can set a threshold with your preferences, one for the bottom part of your chart and the second for the top part. You should set
negativeColor and
color properties also to see properly colors on your chart.
plotLines should be set with the same values as the thresholds.
Demo: https://jsfiddle.net/BlackLabel/xwfbaetm/
API reference: https://api.highcharts.com/highcharts/s ... ativeColor
https://api.highcharts.com/highcharts/series.area.color
https://api.highcharts.com/highcharts/yAxis.plotLines
Let me know if that was what you were looking for!
Best regards!