1, see the position to make a single stop loss. As mentioned above, in the upward trend, wait for the price to return to the important support level to buy, and stop the loss after the effective position breaks. Short positions can be sold on the upper track of the rising channel (but it is easy to sell short positions without opening new positions); In the downward trend, wait for the price to rebound to an important pressure level to short, effectively breaking the stop loss. 2. short when the price rises above the important pressure level and buy back the stop loss. When the price of silver falls below the important support level, short and stop. Similarly, buy and close positions on the lower rail of the downtrend channel.