Overfitting in algorithms = shooting arrows and then drawing the target, or carving a mark on a moving boat to find a sword. Since most of you don’t write code, let’s make it easier to understand by applying this definition to the market. Then you’ll instantly get one of the most common mental traps in the market: I feel, I think, I assume. Big bro says X, the news says Y, the teacher says Z. Institutional thinking, whale thinking, top-selling and bottom-buying thinking. The funniest and most misleading of these is the so-called 'institutional thinking' and 'whale thinking.' If there really were a giant institution capable of controlling the market, and their position strategies, trading rhythms, and position adjustments could all be deduced by retail traders using a few candlesticks, then that institution wouldn’t be a giant—it’d be a clown. Anyone claiming they can 'figure out institutional costs and entry points through candlesticks' is overfitting. It’s like eating leftovers that have gone bad and getting food poisoning.