2. Buying technique: Investors can buy during the trough period when the market is falling and far away from the bottoming center area. The trough position usually appears at the support line of the trend channel, the edge line of the trading intensive area, or the lower track of the Bollinger Bands. Before buying, it is important to make a stop loss, otherwise there is a high risk of being trapped.

3. Selling technique: When selling, we should choose the peak period, which is the area where the stock price fluctuates the most. The peak usually appears at the upper track of the Bollinger Bands, the edge line of the trading intensive area, and the position of the upper trend line of the trend channel. At the same time, we should also take profits to avoid being greedy and missing the opportunity to sell.

4. Stock holding skills: Stock holding should be determined based on the wavelength, and short-term and long-term operations should also be determined based on objective market facts. It is necessary to make full use of fundamental turning points and seize buying and selling points.