TRADING 101: THE SIMPLE MOVING AVERAGE

By: Greg PerlinMay 14, 2012 4:00pm CDT 7969


Moving averages are very simple, yet extremely useful tools for traders. A moving average is simply the average of a series of numbers over a period of time which is constantly updated by dropping the oldest value and then adding the newest value and recalculating the average. So a 5-day moving average of a commodity would be a sum of the closing prices for the last 5 days divided by 5. After the next trading day, we would drop the oldest day’s closing price and calculate the average with the latest day’s price in its place. So over time, the average moves as new data is added and old data are dropped off.


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