Support and resistance levels are the points in the chart that experience sustained upward or downward pressure. The support level is usually the lowest point in all chart modes (hourly, weekly, or annual), while the resistance level is the highest point (peak) in the chart. When these points show a recurring trend, they are identified as support and resistance. purchase/The best time to sell is on unbreakable support/Near the resistance level. Once these levels are broken, they tend to become reverse obstacles. Therefore, in an upward market, the broken resistance level may become a support for the upward trend; However, in a declining market, once the support level is broken, it will transform into resistance. 3、线条和通道