docs: def get_macd(self, symbol, interval='daily', series_type='close',
                   fastperiod=None, slowperiod=None, signalperiod=None):
          """ Return the moving average convergence/divergence time series in two
          json objects as data and meta_data. It raises ValueError when problems
          arise
  
          Keyword Arguments:
              symbol:  the symbol for the equity we want to get its data
              interval:  time interval between two conscutive values,
                  supported values are '1min', '5min', '15min', '30min', '60min', 'daily',
                  'weekly', 'monthly' (default 'daily'
              series_type:  The desired price type in the time series. Four types
                  are supported: 'close', 'open', 'high', 'low' (default 'close')
              fastperiod:  Positive integers are accepted (default=None)
              slowperiod:  Positive integers are accepted (default=None)
              signalperiod:  Positive integers are accepted (default=None)
          """
          _FUNCTION_KEY = "MACD"
          return _FUNCTION_KEY, 'Technical Analysis: MACD', 'Meta Data'