支撑和阻力水准是图表中经受持续向上或向下压力的点。支撑水准通常是所有图表模式(每小时、每周或者每年)中的最低点,而阻力水准是图表中的最高点(峰点)。当这些点显示出再现的趋势时,它们即被识别为支撑和阻力。买入/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.