I think it would probably be a really big mistake to ASSUME that using an automated stop overnight will work out better in the long run than just leaving a fixed stop-loss above or below a recent swing high or low.
You can try it, of course, if it feels right to you, but the price you’ll sometimes pay for it is that it will take you out of trades by just a few pips, which would have developed really well for you when the retracement that hits the stop-loss is corrected and the trend resumes in the direction of your trade.
The difficulty with doing this is that some or many of the trades which you’re taken out of would have been really profitable if you hadn’t used the automated stop loss.
Personally, I’d find that very worrying indeed.
20% of my trades tend to produce 80% of my profits, over the long run (that’s true of most traders, isn’t it?), and those 20% of trades are just the ones an automated stop-loss would take me out of.
For me, it would probably even turn my trading from overall profit into overall loss.
But, again, perhaps that’s just me and my trading.
What matters is for you to learn how to TEST it for yourself and see whether or not you agree, for your trading.
My own guess, however, is that if you test it thoroughly, you’ll decide not to use it (I’m saying that because it’s certainly what’s happened with all the other people I know who have tested it out for themselves).
Generally, the people using this are all the ones who - for whatever reason - haven’t actually tested it properly for themselves.