You can try like this steps:
1. add highcharts to knowagecockpitengine/js/lib/
2. update \knowagecockpitengine\WEB-INF\classes\engine-config.xml
3. update knowagecockpitengine\WEB-INF\jsp\chart\execution\chartRenderImport.jsp
4. add some chart template to knowagecockpitengine\WEB-INF\classes\chart\templates\highcharts414
In this template you need to binding attributes and values.