What is Exponential Moving Average (EMA)

Exponential Moving Average (EMA) is one of the essential technical indicator used widely by traders and investors . Exponential Moving Average (EMA) gives more weighting to recent price data compared to Simple Moving Average (SMA) . EMA is quite similar to SMA as it helps traders to measure trend direction of any security thus helps in predicting the future trend . Essentially its a trend direction indicator .

(EMA) is used to know long-term trends. EMA gives more accurate recent price action compare to SMA . This is because EMA uses the latest data point and the oldest data point gets the least observation . If you do not know about SMA and its calculation read our article on same . This will help you to clear fundamentals of (MA) Moving Averages .

How to calculate Exponential Moving Average (EMA) :

You do not need to calculate EMA by yourself as most of the technical analysis software lets us drag and drop the EMA . This is just good to know info .

  • First calculate the SMA

        SMA A1+A2++An / n

​        Where Anthe price of an asset at period n

        nthe number of total periods

  • Than calculate the multiplier for weighting the EMA

         Weighted multiplier=2÷(selected time period+1)

        selected time period can be 10 day , 20 days , or 100 days depend upon your strategy . 

  • At end calculate the current EMA

EMA [today] = (Price [today] x K) + (EMA [yesterday] x (1 – K))


K = 2 ÷(N + 1)

N = the length of the EMA ( time period)

Price [today] = the current closing price

EMA [yesterday] = the previous EMA value

EMA [today] = the current EMA value

EMA generally uses the previous value of the EMA in its calculation. Therefore EMA includes all the price data within its current value. Another key point is the more data points you use, the more accurate your EMA will be.


How to Use EMA for Trading :


How to Use EMA for Trading

In the above chart of YES Bank Ltd. have plotted a 14 day SMA (orange) and a 14 day EMA (pink) on closing prices. Both SMA and EMA are for a 14 day period. Additionally you can also notice that the EMA is following prices more closely than a corresponding SMA .

You can see a well established signal for selling occurred , when prices started falling below EMA & SMA  .This is what you have to keep in mind . As a trader opportunities will come its up to you how you capitalize them .


        Use EMA for Trading

In the chart you can see how well a buying opportunity been given by EMA & SMA . Its a huge rally that started happening when prices moved above the Moving Averages . You can use both SMA & EMA  for better & smooth signals .

  • Moving averages ensure that a trader is in line with the current trend. The trend is your friend and it is best to trade in the direction of the trend.



 Important points to remember While Using EMA :

  • A falling EMA indicates that prices, on average, are falling. Hence this moving can be used to determine buying and selling opportunities in market .
  • A rising moving average shows that prices are generally increasing. In other words one should look at buying opportunities.
  • A long-term MA moving from a lower position to a higher one reflects a long-term uptrend.
  • A long -term plunging MA , moving from a higher to a lower level reflects a long-term downtrend.
  • EMA is also more vulnerable & get exposed as EMA reacts faster when the price is changing direction . To put it another way It may give you false or fake signals .
  • A trader might use crossovers of the 50 EMA by the 10 or 20 EMA as trading signals.
  • The most generally used EMAs by traders are the 5, 10, 12, 20, 26, 50, 100, and 200.
  • Where as the 50, 100 and 200 EMAs are considered to be useful for longer-term trend trading .


Whichever tools and indicators you are using for your trading and investing purpose, make sure you have basic understanding of them. Once you start using it you will eventually know through experience, if a signal is false or does it really a buy or sell. In sideways market these indicators may give fake signals. Another key point is to put your stop loss at place and wait patiently .

We will be learning about more technical indicator and tools in forthcoming days . Till than try to use any of the strategy and share your experience with us in comment box below.


Astha Credit & Securities (P) Ltd alias AsthaTrade is an Indian stock broking company established in 2003. The company is a member of the National Stock Exchange of India (NSE) and Multi Commodity Exchange of India Limited (MCX).It is a depository participant with National Securities Depository Limited (NSDL).
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