Hi,

I would like to plot the 1 day change in %B value (i.e., today's value of %B minus yesterday's value of %B). I would like to use the default parameters for Bollinger Bands (20,2).

Thanks,

The best way to do this would be to add both a Bollinger Bands %B 20, 2.00 and a 1 period Rate of Change (not %) indicator to the chart. You could then change the Data Source of the ROC indicator to use the %B instead of price.

Adding and Moving Indicators (7:19)
Change Data Source (3:38)

This could also be done as a Custom PCF Indicator with the following Formula.

((C - AVGC20) / SQR(ABS(C ^ 2 + C1 ^ 2 + C2 ^ 2 + C3 ^ 2 + C4 ^ 2 + C5 ^ 2 + C6 ^ 2 + C7 ^ 2 + C8 ^ 2 + C9 ^ 2 + C10 ^ 2 + C11 ^ 2 + C12 ^ 2 + C13 ^ 2 + C14 ^ 2 + C15 ^ 2 + C16 ^ 2 + C17 ^ 2 + C18 ^ 2 + C19 ^ 2 - 20 * AVGC20 ^ 2) / 20) - (C1 - AVGC20.1) / SQR(ABS(C1 ^ 2 + C2 ^ 2 + C3 ^ 2 + C4 ^ 2 + C5 ^ 2 + C6 ^ 2 + C7 ^ 2 + C8 ^ 2 + C9 ^ 2 + C10 ^ 2 + C11 ^ 2 + C12 ^ 2 + C13 ^ 2 + C14 ^ 2 + C15 ^ 2 + C16 ^ 2 + C17 ^ 2 + C18 ^ 2 + C19 ^ 2 + C20 ^ 2 - 20 * AVGC20.1 ^ 2) / 20)) / 4