By default a chart displays all the data in the grid.
To chart selected data in a grid:
The data cells selected remain selected until another selection is made. If the selections in the grid change, the chart still shows the data members originally selected. For example, if you charted Profit% in the grid and you include more products in the grid under Profit%, the chart will not change until you choose Chart > Selected Data Only again.
If there is not enough data to chart, the message No data available will appear in the chart area. If the No data available message appears, You can click the Show All Data button in the chart or reselect the data cells and chart the selected data again.