Time Series Chart - Visualizing Hrs/Min/Sec

Thank you intapiuser and taras .  This does help address my usecase. I have however run into problem. The X axis which displays the hours starts with some offset minutes. As seen in the below chart, instead of displaying every hours 9:00 AM, 10:00AM, the x-axis starts at 09:20 am.  Any ideas on tweaking the script to fix this error ?