I need set my xAxis to datetime for use correctly the tickInterval.
In my example, i used it for setting my category:
options.xAxis.categories.push(Date.UTC(2010, 3, 4,12,10));
But, I cannot use the tickInterval, the Highchart read my serie like a normal categories (not datetime) but I used type: 'datetime' on the xAxis.
My code is in: