First of all, it depends on the volume. At some turning points, if the trading volume is relatively large, there will be competition in this position in the early stage, and with the large trading volume, it can basically be regarded as a strong support level or resistance level. Normality is an obvious early high point and the second high point draw a line, which is called the pressure line. The line connecting the previous position and the second lowest point is called the support line.

The stock price has been blocked by the first line for many times, that is, the resistance line (including the trend line, the previous high-voltage line, 30, 60, 120 and other important moving averages). And the downward gap, the longer the better, the dead fork of the moving average, etc. ). Support line means that the stock price bounces back after being supported by this line for many times. There are also many situations.