How to calculate moving/rolling average in Excel?
For example, a stock's price fluctuated widely in past time, you recorded these fluctuations and want to forecast the price trend in Excel, you can try the moving average or rolling mean. This article will introduce a couple of ways to calculate moving/rolling average for a specific range and create a moving average chart in Excel.
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We can apply the Average function to easily calculate the moving average for a series of data at ease. Please do as follows:
1. Select the third cell besides original data, says Cell C4 in our example, and type the formula =AVERAGE(B2:B4) (B2:B4 is the first three data in the series of data) into it, and the drag this cell’s AutoFill Handle down to the range as you need. See screenshot:
Note: We need to calculate the moving average with the interval of 3 data, therefore we enter the formula into the third cell.
2. Keep selecting these formula cells, and click the Decrease Decimal button to adjust the decimal places of moving average results as you need. See screenshot:
Excel 2010 and 2013's Data Analysis command supports us a group tools of financial and scientific data analysis, including the Moving Average tool which can help you to calculate the average of a specific range and create a moving average chart easily.
1. Click the File > Options.
2. In the Excel Options dialog box, click the Add-Ins in the left bar, Keep Excel Add-Ins selected in the Manage box and then click the Go button.
3. In the opening Add-Ins dialog box, check the Analysis ToolPak in the Add-Ins available box, and click the OK button.
4. Now you get back to the main interface of Excel. Click the Data > Data Analysis. See screenshot above:
5. In the popping up Data Analysis dialog box, click to highlight the Moving Average in the Analysis Tools box, and click the OK button.
6. Now in the throwing out Moving Average dialog box, please:
(1) Put cursor into the Input Range box, and then select the range you want to calculate the moving averages. In our case, we select the Range B2:B13.
(2) In the Interval box, enter the interval you want to calculate moving averages based on. In our case, we enter 3 into it.
(3) Put cursor into the Output Range box, and then select the range you want to output the moving averages. In our case, we select the Range C2:C13.
(4) Check the Chart Output option, and click the OK button.
Now you will get the moving averages in the specified cells, meanwhile, a moving average chart is created besides the moving averages. See screen shot below:
Note: This method does not work in Excel 2007 because the Analysis ToolPak is not available in Excel 2007.
If you have created a column chart in Excel before, you can add a moving average trendline for this existing chart easily as following:
1. Select the chart, and then click the Design > Add Chart Element > Trendline > More Trendline Options in Excel 2013.
(1) If you do not need to specific the interval of moving averages, moving average names, etc., you can click the Design > Add Chart Element > Trendline > Moving Average directly.
(2) In Excel 2007 and 2010, you can click the Layout > Trendline > More Trendline Options.
2. In the opening Format Trendline dialog box/pane, check the Moving Average option and specify the Interval of moving average in the Period box. See screen shots:
3. Close the Trendline dialog box/pane. Now you will see the moving average trendline is added in the column chart. See below screen shot: