code: def getMaxDrawDown(self):
      return (self.__lowWatermark - self.__highWatermark) / float(
          self.__highWatermark
      )
  
file_path: pyalgotrade/pyalgotrade/stratanalyzer/drawdown.py
imports: from pyalgotrade import stratanalyzer
  import datetime
label_desc: Use image node_id 3 for calling the DrawDownHelper obj's underlying member method code with example usage: obj.getMaxDrawDown() and returns: unknown