score:1

Accepted answer

highcharts uses plotx and ploty point's properties to position the tooltip in a default way. in your case, only properties: x, y, z and point's graphic are updated. you need to also update plotx and ploty:

dataobject.plotx = data.x + data.z;
dataobject.ploty = data.y + data.z;

live demo: https://jsfiddle.net/blacklabel/9drynwcz/


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