A sparkline is a very small chart that usually fits within a cell that presents the shape of the variation of data. In the video, I use mode, median, and mean of a range of data to create a chart and sparkline. One can visually see the sparkline having the same shape of variation as the more detailed chart.
+Phil Ballard has since updated his post because Google added more features to sparklines. Looks like you can now make sparklines of a variety of charts such as bar graph, column, or win - loss.
