Friday, February 09, 2007

 
Technical Indicators

Standard Error Bands

Created by Jon Anderson, Standard Error Bands are two moving averages based on standard error levels above and below the Linear Regression Indicator. As a type of envelope, they are similar in appearance to Bollinger Bands but are calculated and interpreted quite differently. While Bollinger Bands are plotted at standard deviation levels above and below a moving average, Standard Error Bands are plotted at standard error levels above and below the linear regression plot.

Andersen recommends default values of "21" for the number of periods, a 3-day simple moving average for the smoothing, and "2" standard errors. He also notes that very short time frames tend to produce unreliable results.

Because the spacing between Standard Error Bands is based on the Standard Error of the security, when the two bands are close together, it signifies a strong trend. When the two bands are far apart, prices are more volatile and will tend to fluctuate between the two bands. If the bands are close and then begin to widen, it may signify that the trend is weakening and may possibly be due for a reversal...

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