docs: def eval_algorithm(curr, prev):
          """ Evaluates OBV
  
          Args:
              curr: Dict of current volume and close
              prev: Dict of previous OBV and close
  
          Returns:
              Float of OBV
          """
          if curr['close'] > prev['close']:
              v = curr['volume']
          elif curr['close'] < prev['close']:
              v = curr['volume'] * -1
          else:
              v = 0
          return prev['obv'] + v