moving average (MA)
The average price of a security or index for a given period of time, typically 50 or 200 days, although bollinger bands uses a 20-day moving average. MA can be calculated as an exponential moving average (EMA) or as a simple moving average calculated by adding together the Closing Price over "n" periods and dividing by "n." Each time the period advances, the calculation is updated to include the data from the most recent "n" periods. In common usage, unless EMA is specified, a simple moving average is assumed.
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