How
Bollinger Bands Help Make Sense of Volatile
Stocks
Bollinger
bands are a type of limit measures that are plotted based upon
the standard deviation levels above and below a selected moving
average.
The
result of this exercise is to produce bands that widen during
periods of high volatility, or contract when trading occurs in
a less volatile fashion.
Gauging
Market Interest via Bollinger Bands
Consequently,
when these bands are large for a particular stock, it is a sign
that there has been serious market interest in the underlying
company.
In
this sense, Bollinger bands can be viewed as an indicator in
regards to the supply and demand of the underlying security in
question.
When
a stock is in a period of low volatility, which is usually
characterized by a horizontal trading pattern, these bands
contract towards the moving average.
This
would usually occur when the market for the stock is in a
period of indecision. One would suspect this type
of activity between major news announcements when volatility
typically drops significantly.
Spotting
Breakout Potentials
As a
measure of volatility for stocks, Bollinger bands can represent
areas where many investors place orders to protect against an
unfavorable breakout concerning their
position.
Typically,
when the bands have been narrow for a significant period of
time, a breakout from the band can represent a fairly strong
indication that volatility will increase in the direction of
the breakout.
Such
an occurrence, therefore, should be regarded as a possible
trading opportunity.
Trading
near the upper or lower Bollinger band limits is also
interpreted as a possibility that a trend reversal is about to
occur.
This
does not always materialize, however, and one should always use
other indicators in conjunction with Bollinger bands to confirm
a suspected market reversal.
This
prudent approach also holds true for when trading breaks out of
the Bollinger limits. Whatever the move anticipated
by an individual investor, he or she is always wise to use
confirmation indicators before undertaking a
position.
Measuring
the Value of Oversold or Overbought
Securities
As
a volatility measure, Bollinger band limits basically
indicate whether an individual stock is overbought or
oversold.
However, they do not in and of themselves indicate a buy or
sell signal.
Bollinger
bands are actually indicators as to the volatility of a
particular security. As a result, for trading
purposes, one would want to look at the activity of trading
within the bands in conjunction with another tool, such as
the Relative Strength Indicator, to properly undertake
investment decisions.
Historically,
when a price movement has been identified originating at one
of the Bollinger limits, it will more likely than not
continue at least to the opposite limit
band.
Bollinger
bands are in essence a graphic representation of the volatility
that exists in the market for any particular
stock.
As
such, they allow the investor the possibility to identify
periods where opportunities for the undertaking of successful
positions can arise.
When
used in conjunction with other indicators, the knowledge and
use of Bollinger bands can greatly improve any individuals
trading performance.
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