Under Visualization Settings, you can choose to add a regression or moving average trendline to your line series which can help to depict a clearer pattern in the data. Options include Linear, Logarithmic, Exponential, Power, Quadratic, and Moving Averages.
For more information, see the documentation.
If you want to export moving averages or you want to add many averages to a table at once, you can create calculated metrics instead. Learn more in this video.