Show only the last 30 records in a Chart
I am a somewhat of a novice and need some help. I have layout that provides some quick referece charts, each one on a tab. On one of my charts I want to show only data from the last 30 records. I have multiple y-axis data series. Is there a way to use a calculation in conjunction with a count function to limit my data to only the last 30 records?
Thanks in advance!!!