It is generally calculated by subtracting a 26-day exponential moving average from a 12-day EMA.

它通常由12天指数移动平均数减去26天指数平均数得来。

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Note that the 21 period is an exponential moving average and the 5 period is a simple moving average.

需要注意的是，21期是指数移动平均线，5期是一个简单的移动平均线。

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The exponential moving average is a type of moving average that gives more weight to recent prices in an attempt to make it more responsive to new information.

指数移动平均线是一种给最近价格更多加权并使其更能应对最新信息的移动平均线。

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Another popular tool used by many traders is the 20-day exponential moving average (EMA).

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Downward trending stochastics above 72 suggest the stock is currently overbought, and the stock is threatening to break below the 10-day exponential moving average which it used as support throughout September.

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The MACD is calculated by simply subtracting a 26-period exponential moving average (EMA) of the closing prices from a 12-period EMA. The signal line is a nine-period exponential moving average of the MACD.

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