@yanzai,
You can format x-values that appears in toolTip & indexLabels to your desired format using xValueFormatString. Please take a look at this page for list of supported formats. In your case, setting xValueFormatString to “hh:mm” should work fine. If this doesn’t solve your requirement can you kindly create a jsfiddle with sample data so that we can understand your code better and help you out?
—
Vishwas R
Team CanvasJS
