1, theoretically, the shorter the period, the faster the fluctuation, the worse the trend stability and the higher the risk. Of course, the efficiency is also high.

2. The bigger your capital, the bigger the cycle you choose, and the smaller the cycle, so it is difficult for you to open a position under the premise of relative safety.

3. Your personality is also very relevant. If you are "slow", you may not be suitable for small-cycle trading mode.

Personally, I think it is better not to be less than 5 minutes.