Thank you so much for your valuable comment at my post and I am happy to know that you understand both of my examples of indicators that I have shown you guys

Secondly I have explained and applied bullingers band indicator at step by step explanation to show the volatility at chart and time happy that you clearly understand about it whatever I tried my best to explain as well as I have also visited your entry it was very informative also I wish you good luck again and thanks for wishing me