Although not part of the charts, Sparklines are mini charts that appear within cells. They are very useful for showing trends.
You will end up with a little chart in the cell (in this case a line chart) as shown below. As small as it is, it is very useful to get a sense of data. So in the example below we can now easily see that there is a little dip in the middle of the data.
To see the full course contents click here.