I have a Task table which contains a StartDate and EndDate. I need to do a line chart of quarters (FT13_Q1 for example) with the total number of tasks which had ANY overlap within the quarter. I built an island Calendar with dates and quarters, and can chart which quarter a task started or ended in. But I can't figure out how to chart overlaps. I'm looking for the X asis to be quarters and the Y axis to be the number of tasks. I've attached a tiny example if anyone can help.