First, open the MT4 software and bring up the "right-click" of the K-line chart to which you want to add the moving average-"chart window". After that, you can click the icon as shown in the figure, which is more convenient to analyze the graph.

Start to adjust the moving average "insertion"-"trend indicator"-"moving average".

Pop-up window, add a single time period according to your own preferences.

After completing the above operations, you can see the software interface when you return to MT4 software, and the moving average of MT4 software has been set.