In the US, there are professional players in prediction markets. This time, the trader Domer, who has placed bets on over 9,800 markets on the prediction market Polymarket, has transacted more than $490 million, earned $2.28 million in trading profits, and also received over $1.2 million in order placement rewards from the platform. He has very precise control over the rules and the market. I calculated from his on-chain records that his long-term win rate can exceed 60%. The professional trader invited to the US 60 Minutes episode about prediction markets is him. He is very active, just like the current intense US midterm elections; Domer has long been involved. He also bets on other markets, such as elections, the Federal Reserve, and the Oscars. How does one person bet on such a variety of markets and still maintain such a high win rate? I searched for two days and finally found it: he leaked a complete set of trading rules. Such a comprehensive resource is very rare in the prediction community. Next, I will reveal it all to you. Each question in the prediction market counts as a market, divided into yes and no sides. If you guess correctly, you get back one dollar for each share; if you guess wrong, you get zero. So the price is the probability given by the market. His trading logic is to find the difference between his own judgment and the market price. For example, if you think an event has a 70% chance of happening, but the market only sells at fifty cents, the difference is the edge. He divides betting into four steps: selecting markets, pricing, position sizing, and holding positions. The first step is selecting markets, which involves looking at four things before deciding which side to bet on. The first is price. Every day, he scans hundreds of markets, ten