class_docstr: An enumeration for the directions of a stop criteria.
class_docstr_tok: ["An","enumeration","for","the","directions","of","a","stop","criteria","."]
code: def __str__(self) -> str:
      return str(self.value)
  
imports: import operator
  from abc import abstractmethod, ABCMeta
  from typing import Callable, Union, TypeVar
  from enum import Enum
  from tensortrade.oms.orders import TradeSide, Order
  from tensortrade.oms.exchanges import Exchange
label_desc: Use image node_id 1 for calling the StopDirection obj's underlying member method code with example usage: obj.__str__() and returns: str