scrollbar property

An optional scrollbar to display on the Y axis in response to limiting the minimum an maximum of the axis values.

In styled mode, all the presentational options for the scrollbar are replaced by the classes .highcharts-scrollbar-thumb, .highcharts-scrollbar-arrow, .highcharts-scrollbar-button, .highcharts-scrollbar-rifles and .highcharts-scrollbar-track.

API Docs: https://api.highcharts.com/highstock/yAxis.scrollbar