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subject: Day Trading Utilizing Sma And Ema [print this page]


To investigate market price trends of securities in day trading, a day trader uses a moving average formula as a device. At present, day traders have 4 variations particularly simple moving average, exponential moving average, smoothed moving average formula and linear weighted moving average. In order to smooth out fluctuating movements of prices, day traders make use of a moving average formula. The two most commonly used are the simple and exponential moving average.

SMA or the simple moving average is considered to be the average or the mean of a set of data in a certain time period. Simple moving average comes by adding the stock prices at a particular time period and dividing the sum by the number of hours. The label itself reveals that it utilizes simple arithmetic.

To show you a sample:

10-hour period:

Time Period - 1st hr 2nd 3rd 4th 5th 6th 7th 8th 9th 10th hr

Price of Stocks - $3 $5 $8 $7 $10 $4.5 $8.43 $4.5 $3.75 $5

These rates, if plotted on a chart, would certainly create distinct fluctuations. To smooth out these fluctuations and give the day trader an inkling of the probable future stock prices, he uses the simple moving average.

This is a sample calculation for simple moving average:

$3 + $5 + $8 + $7 + $10 + $4.5 + $8.43 + $4.5 + $3.75 + $5 = $59.18 (sum)

$59.18 is then divided by 10 (number of periods used) = $5.918 (SMA)

When an Eleventh hr price is being added, the first hr cost is ruled out from the calculation and the uncomplicated process is repeated. We currently have here an SMA time period of 10 hrs. The longer the time period, the more it lags behind the price.

In simple moving average, precisely the same weight is given to old and new data. EMA, alternatively, grants more significance to the new data than the old ones. Because the EMA places more emphasis on the latest day trading activities, it can provide a far better day trading signal to a day trader. The problem with working with EMA is the higher probability of obtaining bogus purchasing signals. For a better solution, a day trader should pair EMA and SMA.

Pay a visit to a day trading blog for more information on the other 2 moving averages. Each of those remaining moving average has its own formula, advantages and disadvantages and youll know more about it upon going to a day trading blog.

by: John Smith




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