Need a way to create a Point with the y value 'undefined'

[Robert Light]

In order to create "flags" which display onAxis, we have to be able to specify a Point object where the y-value is "undefined".... if you specify:

new Point(new Long(1000),null)

you get a Point where the y-value is "null" down in javascript. This results in problems in highstock.js where it tests to see if "point.y !== null" which if used via the jsFiddle examples, evaluates to "true" if point.y is undefined but it evaluates to false if point.y is 'null'

[Philippe Lhoste]

Can't you use Point.setUserData() for this purpose (flagging a point)?