Problems related to the relationship between Bollinger price and time change

During the use of the Bollinger track, it is found that when the market changes rapidly, the track will open rapidly, and when the market consolidates, the track will slowly shrink. How to calculate how much the market changes and how much the track opens? How long will the orbital opening shrink after consolidation? Is there any formula for this part?

布林軌使用過程中發現當行情快速變化時軌道會快速張開，而行情盤整時軌道會慢慢縮小，請問如何計算行情變動多大軌道張開多大？盤整多久軌道口會縮小多少？請問這部分是否有公式可以參考呢？