(2) It is generally believed that the long-term risk is less than the short-term. However, the judgment of the long line direction needs high accuracy. Otherwise, without stop loss; It is easy to explode.

(3) If short-term and long-term are judged by the length of trading time; Short-term trading can generally be regarded as intra-week trading. The day can be regarded as an ultra-short line.

(4) It is suggested to define the investment cycle; And target income.