Hi,
Thanks for contacting us with your question!
For creating lines and background between two values on yAxis,
plotBands and
plotLines built-in properties come in handy. You can also color line based on it's values by using
series.zones.
Take a look at this demo I've created for you:
https://jsfiddle.net/BlackLabel/4qjc850b/.
I assume from your screenshot that you would like to fill area between lines in lower and upper bound of
plotBand. Unfortunately, there isn't an easy way to achieve this, but you might find this topic useful, as it covers similar subject:
viewtopic.php?t=32882#p115523.
References:
https://api.highcharts.com/highcharts/yAxis.plotBands
https://api.highcharts.com/highcharts/yAxis.plotLines
https://api.highcharts.com/highcharts/p ... ries.zones
Let me know if that was what you were looking for!
Best regards!