code: function (e, method, wktype, callback) {
                var p;
                e = e.originalEvent || e;
                if ((e.pointerType === 'touch' || e.pointerType === e.MSPOINTER_TYPE_TOUCH) && charts[hoverChartIndex]) {
                    callback(e);
                    p = charts[hoverChartIndex].pointer;
                    p[method]({
                        type: wktype,
                        target: e.currentTarget,
                        preventDefault: noop,
                        touches: getWebkitTouches()
                    });
                }
            }
docs: The touches object keeps track of the points being touched at all times