Futures may show a certain trend for a long time because of season, supply and other factors. Grasping this trend for a long time is an effective way to make a profit. This is relatively easy to understand, and the implementation process will not change often.
Short-term is not so well understood, and may only be based on the fluctuation of relative laws in some cases, but the nature of this law is difficult to understand, or the reasons behind it are simply not understood. Not easy to find, not easy to understand and use.
Therefore, short-term futures are not impossible, but it is too difficult to succeed before recommendation.