because many people in the HN audience want to or do make money trading from home on their computers, and the content of the article matches this audience
>Really? I thought that HN commentators were typically smarter ...
That's a common sentiment.[0]
I've made money on forex, but to be clear -- I made the trade knowing it was a gamble and made out. This isn't smart behavior.. but I'm surely not the only one here.
It's a 'hobby' that appeals to people who like to automate and script things, even if the exchanges are actively malicious towards hobbyist-'quants'.
I don't think it is "in-group bias" to say that if I gave an SAT test to a random sample of HN commentators and then gave one to a random sample of Americans, the HN commentator group would very likely do better.