Hi williamwong,
Thanks for contacting us with your question.
You can create it either by switching series visibility using
setVisible method or adding and removing series. You also need to remember to link series to right axis.
Demo: https://jsfiddle.net/BlackLabel/r94qvoj0/
Here you can find an example with add and remove series:
viewtopic.php?t=44011
Let me know if that was what you were looking for!
Regards!