How to determine the start date of 1 1 astronomical disk?

Short-term trading time is generally two or three days of high consolidation.

The medium-term change time usually spans one to two months, and the long-term change time spans one year. The time window of change is generally determined according to the last cycle, such as how many days the market rose in the last cycle.

The change day is the trading day when the market fundamentally reverses. For example, the market starts to rise all the time, but it forms at the top, and the trading day when it starts to fall is the change day.