I use Webull, I use the default band settings, “length 5, width 2” so 2 standard deviations of change and middle band is moving average of 5X whatever time frame selected. What I’ve found to be important with bands is getting a feel for the different time frames and how you like to trade. Bollingers work well for me as channels, upper or lower channel, and direction of middle band. Would recommend using 5 min view, then if you start to see an opportunity, check it against V-WAP, then check it against the 30 min, 1 hour and daily view to see where the price is on all those bands. For me, if the price is at the top or bottom band on the 5 min, I look for there to be room in the other time frames for any play I make to run.