How to draw arrows on a line-chart with Highcharts?

Question

I\'m trying to add an arrow to the end of my Highcharts line-chart. I\'ve already looked through similar questions but the solutions don\'t seem to work:

The result

Answer 1

(UPDATE) plot graph XY

if (lastPoint.plotX > nextLastPoint.plotX || (lastPoint.plotX==nextLastPoint.plotX && lastPoint.plotY > nextLastPoint.plotY)) 

Grap Arrow Line XY