Is the following a correct past perfect sentence?


  I would have killed the snake if I had hit him hard with a stick.



Question: Highcharts - Cannot set x-axes categories in column charts with negative values
Answer: You are sending in options to a StockChart. If you look in the API for xAxis on StockChart you see that it has no categories.

If you are not using any Highstock functionality I would switch to a regular Highcharts-chart, using new Highcharts.Chart instead.

If you must use Highstock you will have to look into other alternatives, as the xAxis uses time intervals. This StackOverflow answer may give you some hope, depending of how you are using Highstock in your implementation.