class_docstr: Fast Stochastic Oscillator filter as described in
  http://stockcharts.com/school/doku.php?st=stochastic+oscillator&id=chart_school:technical_indicators:stochastic_oscillator_fast_slow_and_full.
  Note that the value returned by this filter is %K. To access %D use :meth:`getD`.
  
  :param barDataSeries: The BarDataSeries instance being filtered.
  :type barDataSeries: :class:`pyalgotrade.dataseries.bards.BarDataSeries`.
  :param period: The period. Must be > 1.
  :type period: int.
  :param dSMAPeriod: The %D SMA period. Must be > 1.
  :type dSMAPeriod: int.
  :param useAdjustedValues: True to use adjusted Low/High/Close values.
  :type useAdjustedValues: boolean.
  :param maxLen: The maximum number of values to hold.
      Once a bounded length is full, when new items are added, a corresponding number of items are discarded from the
      opposite end. If None then dataseries.DEFAULT_MAX_LEN is used.
  :type maxLen: int.
docstr: Returns a :class:`pyalgotrade.dataseries.DataSeries` with the %D values.
code: def getD(self):
      """Returns a :class:`pyalgotrade.dataseries.DataSeries` with the %D values."""
      return self.__d
  
file_path: pyalgotrade/pyalgotrade/technical/stoch.py
imports: from pyalgotrade import technical
  from pyalgotrade.dataseries import bards
  from pyalgotrade.technical import ma
label_desc: Use image node_id 2 for calling the StochasticOscillator obj's underlying member method code with example usage: obj.getD() and returns: self