I'm trying to create a custom chart based on the Highstock Basic Line Chart.
To be more exact I'd like to create a drawdown-chart (see drawdown chart on wikipedia). I don't want to discuss the formula :), but the way to change the data display in Highstock/Highcharts following a certain rule. It could be a more simple one: imagine you want to display f(x) = 100 for every data point although your data is completely different.
The following requirements shall be fulfilled:
I want to use as much functionality as possible from Highstock like scaling the chart axes, call redraw on "dragging" the time line, etc.
I want to use the Highstock patterns to extend its charts: wrapping or pushing event listeners and in doing so, ensuring my code stays readable and maintainable.
The best try was to wrap the processData function. In its body I manipulated xData and yData and called the super method as explained here: Extending Highcharts
The chart broke displaying certain time ranges. The original data seemed to be displayed there.
I can't get any further unaided. I would be really happy if someone could help me with that.
Thanks in advance!
Niels
