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BB_LOWER — Bollinger Band Lower Trading Series

The BB_LOWER trading series represents the Lower Bollinger Band, calculated using a specified moving average and a standard deviation multiplier. It defines the lower boundary of the expected price range.

It is built upon the Bollinger Bands indicator implementation from the indicators module.

Parameters

BB_LOWER(
    ticker: str,
    source: SourceType = SourceType.CLOSE,
    length: int = 20,
    ma_type: SmoothingType = SmoothingType.SMA,
    std_dev: float = 2,
    offset: int = 0
)
  • ticker (str): Asset ticker symbol (e.g., "AAPL").
  • source (SourceType): The price type to use. Default is SourceType.CLOSE. Supported sources are linked here.
  • length (int): Number of periods for the moving average. Default is 20.
  • ma_type (SmoothingType): Moving average type. Default is SmoothingType.SMA. Supported smoothing types are linked here.
  • std_dev (float): Number of standard deviations for the band. Default is 2.
  • offset (int): Shifts the band forwards/backwards. Default is 0.

Description

  • The lower Bollinger Band typically represents potential support levels.
  • A close below the lower band may indicate an oversold condition or strong downside momentum.

Example Usage

BB_LOWER(
    ticker="AAPL",
    source=SourceType.CLOSE,
    length=20,
    ma_type=SmoothingType.SMA,
    std_dev=2,
    offset=0
)