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In this case they have only one Twitter account but they delete old posts and start over.

Predicted market correct last 5 days in row https://news.ycombinator.com/item?id=6535057

Correct, I only have that one account. You can look at the dates on the tweets. They are indeed from the same time as my previous post for 5 days in a row. The only way i could dupe users is by posting both directions and deleting the incorrect one after the end of the trading day. Of course, I'm not doing that.

Reply on news.ycombinator.com