It is normal for the signal to disappear. When the condition is met, the signal will appear, but when the condition is not met, the signal will naturally disappear.

For the value of the monthly or weekly line, the signal of the month depends on the signal of the day, and the signal will naturally disappear. This is not surprising. Only when the conditions can be met at the end of the month or at the weekend will the signal be retained. The expression and interpretation of words can only go so far. You can't do anything if you don't understand.