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Simple Moving Average (SMA) Explained. A simple moving average (SMA) is the simplest type of moving average in forex analysis (DUH!). Basically, a simple moving average is calculated by adding up the last âXâ periodâs closing prices and then dividing that number by X.
The second day of the moving average drops the first data point (11) and adds the new data point (16). The third day of the moving average continues by dropping the first data point (12) and adding the new data point (17). In the example above, prices gradually increase from 11 to 17 over a total of seven days. Notice that the moving average also rises from 13 to 15 over a three day calculation period.