exponential moving average calulator

joy

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hi friends,
as iam new to stock market can someone tell me where to find a free exponential moving average calculator.
thanks
joy.
 
Simple algorithm in excel should do it

ExpAverage = (2/(length + 1))*close+(1-(2/(length+1)))*ExpAverage[previous day]

length is number of days average to be calculated over.
 
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