If the maximum reverse fluctuation you can bear exceeds the possible reverse fluctuation range of the actual trend, then you don't need to stop loss. However, I don't recommend not setting a stop loss. Stop loss is the guarantee to prevent the loss from expanding.
Stop loss according to your trading system. When it is not enough, even if there are only five points, stop loss.
Everything depends on your trading system. If your trading system tells you that it's time to stop loss, don't think about it and execute it immediately.
The size of the stop loss needs to be considered according to many factors. It is best to follow your trading model.