Sparklines are small charts that fit inside individual cells in a sheet. Because of their condensed size, sparklines can reveal patterns in large data sets in a concise and highly visual way. Use sparklines to show trends in a series of values, such as seasonal increases or decreases, economic cycles, or to highlight maximum and minimum values. A sparkline has the greatest effect when it's positioned near the data that it represents. To create sparklines, you must select the data range that you want to analyze, and then select where you want to put the sparklines.
Do any of the following:
Mark data points on sparklines
Change the style of sparklines
Handle empty or zero value cells