Line Chart with Arrow
You can add an arrow at the end of your line charts to better emphasize trend. Creating a line chart with arrow is no different than creating regular line charts. You just need to add the arrow to the end of line.
Here is a regular line chart:
Now select the last data point on the line and access format data point menu. This can be done either by double clicking on data point or by right-clicking and using menu.
Once there, select End Arrow type from line options and change it as an arrow:
Now the chart should look like this and you have a line chart with arrow: