A technical indicator represented by a line on a chart that is taken from the average of security prices based on a time period- some usual time periods are 10, 20, 30, 50, and 200 days. Moving averages allow for a set of data points to be “smoothed” out in order to analyze overall trends for a specific time period. The calculation for a simple moving average is quite easy; take the closing prices for a specified period add them together and then divide by the length of the period. Often times, technicians use moving averages for buy and sell signals. When the 50day moving average crosses over the 200day moving average, a “buy” signal is flashed as the security is being accumulated. However, as seen from the chart below, when the 50day ma crosses below the 200day ma, a “sell” signal arises as the stock is under distribution.