For example, if you buy a variety at 10 yuan, and the result falls, if you plan to lose at most 5%, you should sell the target when the price falls to 9.5. The usual stop loss order can directly enter the trader's host system, and the time limit can be set by yourself. So you don't have to stare at the market in a limited time. If the price is unfavorable to you, the system will automatically help you sell it around 9.5 if the price changes below 9.5 yuan. Stop loss orders are also risky. When they change rapidly, the transaction price may exceed your expected bottom line. This is mainly because there is time for reaction and execution.
However, at present, A shares and two exchanges only accept limit orders, and the trading principle is price first, time first. Orders that cannot be closed immediately are queued for trading according to this rule, and orders are only valid on the same day. So if you want to stop loss, you must pay attention to manual operation. When you see that the price exceeds your limit, you will sell it immediately. Of course, this job requires a lot of energy. So some people think, can you liberate people? The idea is to use one or several computers (servers) to monitor stock price data, and investors submit their strategies to this intermediate computer. Once it detects that the price deviates from the unfavorable direction of investors, it will automatically generate commissions and submit them to Shenzhen Stock Exchange or Shanghai Stock Exchange, which can also achieve the purpose of automatic stop loss. At present, a few institutions in China have developed such a software platform, but it is a fee-based service. In order to get rid of the stare, they can use their platform to conduct transactions. In order to avoid the suspicion of advertising, I search for keywords such as "intelligent transaction", "automatic entrustment", "automatic order placing" and "automatic stop loss".