Theoretically, the answer has been given upstairs.
However, how can we buy at 100 yuan and close at 120 yuan?
Generally, it is 100 yuan, and then it falls to 80 yuan. At this time, you stop loss, in order to reduce losses, you recognize losses. But when you first came out, the price went up. It is really as high as 120. It seems that the market is aimed at you, just kidding.
Next time this happens, 80 yuan won't stop. It's good. See if it appears. As a result, the market continues to fall and your losses continue to expand. This is the key to the landlord's question.
From the perspective of technical analysis theory, you must make a good analysis before entering the market for the first time. For example, from a macro perspective, a fundamental perspective and a technical perspective. It's all in these books, so I won't say more.
The profit of the futures market is mainly due to your own efforts besides everyone's. For example, understanding and grasping the characteristics of a variety.
Skills of using technical indicators.
Know your market and related markets. These are all to be mastered by yourself through study and practice.
For example, DCE A, you should not only understand the situation of Dalian market, but also analyze and grasp the situation of soybeans in CBOT market.