2. 144 line and 15 minutes are the "watershed" of short-term long-short trend. Similarly, when the price has been on the line15min 144, and the line 144 is also on the rise, it shows that the bulls are in a strong position. Even if the price falls for a short time, or even breaks through the line15min 144 instantly, the short-term upward trend will not change. When the line15min 144 starts to go straight or turn around and go down, it means that the bulls have started to fail. Once the price effectively breaks through the15min 144 line, it means that the bears are getting stronger. When the price has been below the15min 144 line, it shows that the bears are in a strong trend. It is particularly important to note that when the line15min 144 is broken, it can't be pulled out within10min, and there will be another big shade or continuous shade. When the line15min 144 is effectively broken, there will be a big sun or a continuous sun.