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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 longer the moving average, the more the lag. A 10-day exponential moving average will hug prices quite closely and turn shortly after prices turn. Short moving averages are like speed boats-nimble and quick to change. In contrast, a 100-day moving average contains lots of past data that slows it down.elow is an example of a 5-day moving average evolving over three days. The first day of the moving average simply covers the last five days. The second day of the moving average drops the first data point (11) and adds the new data point (16).