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The connection between a and b is called. The neckline seems to be around this man's neck.
Corresponding to-head,-shoulders.
Similarly, the bottom of the head and shoulders also has a neckline, and vice versa.
Neck line is generally the key technical analysis point. ?
Give a picture. The so-called M head also has a neckline, right? The distortion of this figure. But it is definitely not a high-point connection. That's a conceptual mistake.