Requst to rewrite to Bollinger Band

 
I use to often in Bollinger Band and i saw something that i can't do, so please change the code and uplode it .
The change:
In the indicator of Bollinger Band have a parmter that call Deviations (In the default it's equal to 2) and i can use it only in complete number (e.g. 1, 2, 3 )
i want to put in Deviations in complete number, please change it and upload it.
Reason: