Click the MACD indicator in the flush (both Android and IOS operate the same), and you can see BOLL in the displayed column. Just choose it. Bollinger Band Index (Boll) is to calculate the "standard deviation" of the stock price, and then find the "trust interval" of the stock price. The indicator has drawn three lines on the map, in which the upper and lower lines can be regarded as the pressure line and the support line of the stock price respectively, and there is an average line of the stock price between the two lines, and the parameter of the Bollinger Band indicator is preferably set to 20. Generally speaking, the stock price will run in the channel formed by the pressure line and the support line. The general usage of bollinger bands has been described in many books, so I won't say much here. I mainly want to talk about the forecasting effect of bollinger bands on the market. Although indicators such as KDJ and MACD can be used as buying signals by crossing the low position upwards or selling signals by crossing the high position downwards, they all have a disadvantage, that is, they will lose their function or generate fraud lines when the stock price is consolidating, which will bring losses to investors. Usually, in the process of stock price consolidation, what investors want to know most must be when the stock price will consolidate to produce a market. Because if you buy stocks too early, but the stock rises slowly, the utilization rate of funds will decrease, and investors will bear the risk of falling stock prices. At this time, the Bollinger Band indicator can just play its magical role, giving the correct prompt for the end of consolidation, so that investors can avoid buying stocks prematurely.

Straight flush: Android can be downloaded directly, version: 10.38.04.

MACD indicator is composed of two lines and one column, the fast line is DIF, the slow line is DEA, and the histogram is MACD.

1. When both DIF and DEA are greater than 0 (that is, graphically above the zero line) and move upward, it generally indicates that the market is in a bullish market, and you can buy and open positions or bulls;

2. When both DIF and DEA are less than 0 (that is, below zero on the graph) and move down, it generally means that the market is in a short position, and you can sell and open positions or wait and see.

3. When both DIF and DEA are greater than 0 (that is, graphically above the zero line) but both move downward, it generally means that the market is in a downward stage and it is possible to sell and open positions.

4. When both DIF and DEA are less than 0 (that is, graphically below the zero line) but move upward, it generally means that the market is about to rise, and stocks will rise, and you can buy open positions or long positions.