Chart for .NET / User's Guide / Data Manipulation / Functions / Financial Functions / Moving Averages / Exponential Moving Average

In This Topic
    Exponential Moving Average
    In This Topic
     Syntax
    EMA(values; period)
     Arguments
    The 'values' argument must be an array.
    The 'period' argument must be a constant greater or equal to 1.
     Result
    The result is an array.
     Description

    A Moving Average is an indicator that shows the average value of a security's price over a period of time. An exponential (or exponentially weighted) moving average is calculated by applying a percentage of today's price to yesterday's moving average value. Exponential moving averages place more weight on recent prices. The formula of the exponential moving average is:


        EMA[n] = values[n] * Exp_Percent + EMA[n-1] * (1 - Exp_Percent)


    The exponential percentage is calculated internally from the 'period' parameter with the following formula:


        Exp_Percent = 2 / (Time_Periods + 1)


    If you prefer to work with exponential percentages you can use the following formula to convert the percentages to time periods:


        Time_Periods = (2 / Exp_Percent) - 1

     Related Examples
    Windows Forms: All Examples\Data Manipulation\Functions\Financial\Moving Averages

     

     

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