I did pretty well last year while being mostly in cash. I probably averaged 80% cash last year, and still ended with a 30% return or so. The thing I like about swing trading is that you take profits and sit in cash while waiting for setups. You also have limited downside, as you have clear stops that trigger if the setup fails.
That said, there are many ways to trade, and some folks are more aggressive than others. I'm very conservative.
I'm still not sure if I even believe in swing trading or technical analysis. I've been a Boglehead most of my adult life, and only recently decided to dabble with swing trading, just to learn / see if there was anything to it.
So far this year, I'm flat, but I've also been less active due to a few life situations.
I'd like to do a statistical analysis once I've been at it long enough.