You don't want to get a loss if you're closing the day with your positions and it doesn't matter whether you've gained much or just a little.
I think the fear of closing a lossing market dreads the trader but no choice on that. It is better to close a lossing market while it is still small than when the loss has accumulated. There is a way that you can manage a lossing market over the day. To that you can use the stop loss so that it stop the trade when it gets there.
Yes, I've mentioned that.
5% of cutting your loss or stop loss is already good enough when you can't make it as the market dictates. That's what you're going to choose, either win or lose.
It doesn't matter as long as you know what you do and you're stoppage is on time and you don't lose a lot of money due to that. It's a matter of decision when and how much is the percentage.