This post is interesting because it illuminates a formula that I hadn't been aware of.

1 - pick something HN already agrees with and then add some graphs.

2 - explain that the graphs are indicative of the concept that HN agrees with. Regression analysis is not required, and if it were, fudging the numbers would be perfectly acceptable.

3 - add an overly dramatic title, and post to HN!

I really miss the downvote button, but since it doesn't exist anymore I'll complain instead.

History does not repeat itself. Concepts from history do, and lessons can indeed be learned. But looking at graphs "in general" and pointing at where they look similar is wrong at best, and a fantastic way to lose tons of money at worst.