code: def __init__(self):
      self.__highWatermark = None
      self.__lowWatermark = None
      self.__lastLow = None
      self.__highDateTime = None
      self.__lastDateTime = None
  
file_path: pyalgotrade/pyalgotrade/stratanalyzer/drawdown.py
imports: from pyalgotrade import stratanalyzer
  import datetime
label_desc: Use image node_id 1 to create a new DrawDownHelper object from inherited base classes: object with example: obj = DrawDownHelper()