Hello lgerard,
Welcome to our forum and thanks for contacting us with your question!
Basically you can use three things to create arrow like that:
- scatter series:
https://jsfiddle.net/BlackLabel/v5ywstzq/
- SVG renderer tool:
http://jsfiddle.net/BlackLabel/28zk50q9/
API reference:
https://api.highcharts.com/class-refere ... VGRenderer
- Annotations:
https://jsfiddle.net/BlackLabel/yez8g4s1/
https://api.highcharts.com/highcharts/annotations
Each of these options has its advantages and drawbacks but you should be fine with any of this, it is up to you which one do you prefer.
Let me know if you have any further questions.
Regards!