![]() Although for all practical purposes, once it moves beyond two times the length of the average, the weighting is so infinitesimal that it’s irrelevant. Because of the nature of the exponential decay, data for an EMA is taken from an infinite amount of historical periods. = 0.1818 (18.18%)Īn interesting quirk of the EMA is that only about 87% of the data used to calculate the indicator is taken from the actual number of charted price bars in the length of the average. If you’re interested in the math, here’s how to calculate the multiplier for the 10-day EMA: As fresher data points become stale, their weighting in the calculation decreases exponentially-hence the name.įor example, in a 10-day EMA, the most recent data point would count as 18.2% of the total calculation, but the oldest would count as only 3%. The calculation starts out the same as the SMA but is modified so the most recent data points in the series have more weight than the older ones. The exponential moving average (EMA) is the more sophisticated cousin to the SMA. With each new day moving forward, the first day of that 10-day series would be dropped from the calculation and the new day would be added. ![]() For stocks, it’s calculated by adding together all closing prices for a specific number of time periods, then dividing that total by the number of periods.įor example, if a trader wanted to find the current 10-day SMA of a stock, they’d add up each of the closing prices for the last 10 days and then divide by 10. What is the simple moving average?Īs the name might imply, the simple moving average (SMA) is the most basic form of this technical indicator. They do not predict price direction instead, they define the current direction with a lag. Moving averages smooth price data to form a trend-following technical indicator. Understanding which moving average to use and when to use it is important to understand before adding moving averages to your charting basics toolbox. Guess what? There are several types of moving averages, based on different calculations. ![]() Of the hundreds of technical analysis studies and indicators available for traders, perhaps none is more widely used than the moving average.
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