Bollinger Bands are usually plotted on the price chart. Just like in case of the Envelopes, the interpretation of the Bollinger Bands is based on the fact that the prices tend to remain in between the top and the bottom line of the bands. A distinctive feature of the Bollinger Band indicator is its variable width due to the volatility of prices. In periods of considerable price changes (i.e. of high volatility) the bands widen leaving a lot of room to the prices to move in. During standstill periods, or the periods of low volatility the band contracts keeping the prices within their limits.
It is recommended to use 20-period Simple Moving Average as the middle line, and plot top and bottom lines two standard deviations away from it. Besides, moving averages of less than 10 periods are of little effect.
BEARS is a client side VTL script which will combine the properties of trend following indicators and oscillators. They use Exponential Moving Average indicator (EMA, the best period is 13) as a tracing indicator. The oscillators reflect the power of bulls and bears.
It is recommended to use 20-period Simple Moving Average as the middle line, and plot top and bottom lines two standard deviations away from it. Besides, moving averages of less than 10 periods are of little effect.
BEARS is a client side VTL script which will combine the properties of trend following indicators and oscillators. They use Exponential Moving Average indicator (EMA, the best period is 13) as a tracing indicator. The oscillators reflect the power of bulls and bears.
