Different merchant styles can be different to leave the position open for how long. For short-term traders, I'm sure if it's not a good idea to leave the position open for more than one day. This happens for intraday traders too, but intraday traders can be more flexible than Short-term traders such as brokers or news traders. But for long-term traders like swing traders, I think it's okay to open a position for more than a week as long as the conditions are not worse and worse. There must be a limit even though it's okay to leave the position open for a long time.