A lot of people have tried to do what the author did and lost all their money. He recounts how he lost tons of money on different occasions. He says it's been bad for his mental health. He freely admits that much of the limited success he did have was luck, and mentions that doing it during a bull market made everything much easier. But even so he product calculates that, once he mastered this skill hes...
...failed to beat the market. Ouch.
For anyone who skimmed the article (which spends about 90% of it's length talking up "swing trading" and making it sound like the author thinks it's a great idea), make sure you read to the end:
> So what should you do with your time instead of mastering swing trading? Find what you really want to do with your life that adds value to the world, and get to work!
Quite right. (Well, assuming for the sake of argument that swing trading is actually a thing, and that it's something that can be mastered.)