In the downward trend, where the previous trend stops, it is possible to form a resistance level;

Support level and resistance level can be transformed into each other. Is not static.

Remember: once the support level or resistance level is crossed or broken, it is meaningless.

As for the position of the neckline, it often appears in the price forms such as M head, W bottom or head and shoulder top, head and shoulder bottom. These are only useful when doing analysis, so pay attention to the risks in specific operations.