Unless you invest such a small amount that even if you win, you didn't win much.
But also, some swing trades are easier to predict. Some of them are flat out obvious. There are quite a few obvious predictions around this virus scare...
The indices will go up when it's over, oil will rebound, etc.
Whats the biggest losing trade you ever had.
I think mine was losing $50,000 on a Dax trade, back in 2013, was long time ago i. dont remember the details. I might have lost more once on a trade in ZN during NFP back in 2009. Not quite sure.