This index is based on the secondary development of zigzag, adding high and low point arrow indication, thickening the line and changing the color. Can be a good display of the current admission trading signals, current long or short. It can be combined with other indicators to determine the trading point, which has great reference value. Compared with the general trend index or oscillation batch standard, the accurate determination is higher from the perspective of historical data research and judgment. Therefore, the zigzag index only reflects obvious changes. In most cases, we can easily perceive the specific position of price points by using zigzag, It is important to understand that the last quarter of an indicator may depend on the change of your analysis data. It is one of the special indicators. When the price of some transactions changes, the previous value will change. For the analysis of sudden price changes, this ability of zigzag tool can correct itself according to the change of price.