To detect the fall of bitcoin, For a few days, place the circle marked on the chart under a magnifying glass.
A hollow golden circle is shown in the chart. If, during this time that bitcoin is moving towards 41,000, the Bollinger Band, which represents the mean with a deviation from the standard, can not find a valley in the upper band, in the empty circle, To create a low-bandwidth clash during these few hours, Bitcoin will lose all support and fall to 18,950 !!!