At the top of the Data Center report is the Trend Chart. The horizontal axis is the timeline, and the vertical axis is the index.
When you select a time frame to view data, the green curve represents the most recent time chosen, while the grey curve represents the previous period chosen. For example, if the time selected is 15 days, the selected 15 days will be displayed by the green curve, and the grey curve will show the 15 days immediately previous to the date you chose. Select the index you want to see from the drop-down list on the left side of the Trend Chart.
If you select a data report for one day, data is displayed in units of hours. The green curve represents today’s activities, and the grey represents yesterday’s. Select the index you want to see from the dropdown list on the left side of the Trend Chart.