parent_command:etf/ta
usage: bbands [-l N_LENGTH] [-s N_STD] [-m {ema,sma,wma,hma,zlma}]

Bollinger Bands consist of three lines. The middle band is a simple moving average (generally 20 periods) of the typical price (TP). The upper and lower bands are F standard deviations (generally 2) above and below the middle band.
The bands widen and narrow when the volatility of the price is higher or lower, respectively. Bollinger Bands do not, in themselves, generate buy or sell signals; they are an indicator of overbought or oversold conditions. When the
price is near the upper or lower band it indicates that a reversal may be imminent. The middle band becomes a support or resistance level. The upper and lower bands can also be interpreted as price targets. When the price bounces
off of the lower band and crosses the middle band, then the upper band becomes the price target.

optional arguments:
  -l N_LENGTH, --length N_LENGTH
                        length (default: 15)
  -s N_STD, --std N_STD
                        std (default: 2)
  -m {ema,sma,wma,hma,zlma}, --mamode {ema,sma,wma,hma,zlma}
                        mamode (default: sma)


Examples:
- To display Bollinger Bands for an ETF using the default settings: etf/ta/bbands
- To plot Bollinger Bands for an ETF with a custom length of 30 periods: etf/ta/bbands -l 30
- To show Bollinger Bands for an ETF with a custom standard deviation of 3: etf/ta/bbands -s 3
- To visualize Bollinger Bands for an ETF using Exponential Moving Average (EMA) as the middle band: etf/ta/bbands -m ema
- To generate Bollinger Bands for an ETF using Weighted Moving Average (WMA) as the middle band and a custom length of 25 periods: etf/ta/bbands -l 25 -m wma