Recently, someone summarized the core trading principles learned from years of experience, and their insights on ETH and other cryptocurrencies' price movements are definitely worth examining closely.

Let's start with the most practical rules. During a sharp decline, don't rush—market makers typically shake out positions within about 9 days. By the 10th day, the overall sentiment is usually at its lowest point, which is actually a good window for low-cost accumulation. Conversely, during rapid rises, the rhythm is completely different—if the price increases for two consecutive days, start reducing your position because money is always made by selling. Holding on stubbornly can easily lead to being caught in a trap. This logic seems simple, but executing it is difficult for most people.

There are also nuances in sideways trading. If the market consolidates for 6 days, it’s generally a sign of building strength. Once on the 7th day, if there’s a sudden surge in volume, the main players are about to make their next move. This isn’t just rest; it’s accumulation of energy. Another interesting phenomenon is called the "357 Law": cryptocurrencies ranked third on the gainers list often jump into the top 5, and those in fifth place frequently move into the top 7. However, most people get stuck in the psychology of "waiting to break even," and as a result, end up not making any profit at all.

On a more micro level, quantitative trading machines follow fixed rhythms—if the price has risen for four days in a row, expect a dump around 3 PM on the fifth day. This isn’t coincidence but a programmed pattern. There’s also a crucial timing rule: if you don’t recover your trading fees by the next day, exit immediately. The market waits for no one; time costs can be even more damaging than losses.

For those aiming at medium- to long-term trading, the core advice is these three points: don’t focus on emotions during dollar-cost averaging, pay attention to cycles; hold long-term without chasing highs or selling lows—wait until the trend clearly turns to truly profit; and always prioritize risk control—use money you can afford to lose, and never touch your living expenses. These seem like common sense, but very few people can truly stick to them.