What is new after this update:-
1. Updated whole script to version4 and according to new changes in the pine script library.
2. Now user will have the option to show/hide different Bollinger Bands with the option of having upto 3 standard deviation with input value option for each.
Note : This Indicator can still be used to plot 4 moving avarage instead of bollinger bands by just CHECKING "show BB length(1,2,3or4)" and UNCHECKING "standard deviations" associated with it.