Simple Moving Average - SMA
A simple, or arithmetic, moving average is calculated by adding the closing price of the security for a number of time periods and then dividing this total by the number of time periods.
Investopedia Commentary
In other words, it's the average stock price over a period of time. Keep in mind that equal weighting is given to each daily price.
Related Links
Basics of Moving Averages
Moving Averages Tutorial
Introduction To Technical Analysis
See also: Arithmetic Mean Average, Exponential Moving Average - EMA, Moving Average, Technical Analysis
Also spelled: Arithmetic Mean Average, SAM, AMASMA