How to add systemtime(hour) (6AM to 6PM 1 hour interval) in X-axis of sparkline chart in SSRS 2012,

I am generating a table that collects realtime data. I would like to plot record number in the Y-axis and time(hours) in X-axis. I am wondering how can I set that up in Sparkline chart of SSRS 2012. Thanks for the suggestions.