Taking back to the low multiple point and also a Fibonacci, which is a reference commonly used by many traders. What are the backtests 0.382, 0.50, 0.618, 0.786.

If the Fibonacci level is drawn, it can be easily obtained by pulling it out, or it can be calculated using formulas (I rarely use computers and don't like to draw). For example, the highest point of ETH in the morning was 4024, and the most basic is to pull back to 0.382. The highest point within 24 hours is (the highest point - the lowest point) * 0.382, which is 4024 - (4024-3835) * 0.382 = 3951. To pull back to 0.50, it is 4024 - (4024-3835) * 0.50 = 3929.5. This level was just touched in the afternoon, very accurate.
After a pullback, the next step is 0.618. Generally, strong support is around 0.618.
So there are many methods to capture points, and cryptocurrencies emphasize mathematical logic. There are skills in playing coins. It took me 2 years to learn these in the currency circle, all of which are things I figured out on my own.