In order to improve the actual combat ability of foreign communication, we must first practice constantly, accumulate actual combat experience, constantly sum up the right things, sort out the wrong things, then carefully analyze and sort out our own ideas and theories, and then test these theories repeatedly, and then gradually find that these theories also have many defects, and then slowly correct them. As long as you persist slowly and broaden your thinking, you will gradually find yourself. In fact, trading system is a process from simple to complex, and then from complex to simple. Trading itself is not only a technology, but also an art, followed by a very important issue, that is, the so-called mentality. Many people can't hold the list in the transaction, or because of greed, the ducks in their hands also fly. Simply put, this may be a matter of mentality. In fact, the deeper level is still a technical problem. Why is the mentality bad? Mainly absent-minded, there is no excellent technical support mentality. If there is enough excellent technology to support the heart, there will be no such problem, because the heart will not be uneasy because of the fluctuation of the disk, so in the final analysis, the mentality is also a technical problem. If you say that you can make money if you have a good attitude, the monk will never see if you have a good attitude after placing an order, but it is still unknown whether you can make money in the end, so you should understand the essence of the transaction.