bruce your scan from 9/26 ... produced large open bb from very tight bands i was needing to scan from open bands like egg formation going to very closed bands like railroad tracks....with sd(1 ) and period (10)...if possible ..thank you  bob schlomowitz 

The Condition Formula given in the xalyx topic is definitely producing results where the Bollinger Bands have gotten significantly narrower on my computer:

SQR(ABS(C ^ 2 + C1 ^ 2 + C2 ^ 2 + C3 ^ 2 + C4 ^ 2 + C5 ^ 2 + C6 ^ 2 + C7 ^ 2 + C8 ^ 2 + C9 ^ 2 - 10 * AVGC10 ^ 2) / 10) <= .3 * SQR(ABS(C1 ^ 2 + C2 ^ 2 + C3 ^ 2 + C4 ^ 2 + C5 ^ 2 + C6 ^ 2 + C7 ^ 2 + C8 ^ 2 + C9 ^ 2 + C10 ^ 2 - 10 * AVGC10.1 ^ 2) / 10)

About the only thing I can think to change after looking at the Condition Formula plotted as a Custom PCF % True Indicator for a bunch of symbols would be to replace the <= with a < sign instead:

SQR(ABS(C ^ 2 + C1 ^ 2 + C2 ^ 2 + C3 ^ 2 + C4 ^ 2 + C5 ^ 2 + C6 ^ 2 + C7 ^ 2 + C8 ^ 2 + C9 ^ 2 - 10 * AVGC10 ^ 2) / 10) < .3 * SQR(ABS(C1 ^ 2 + C2 ^ 2 + C3 ^ 2 + C4 ^ 2 + C5 ^ 2 + C6 ^ 2 + C7 ^ 2 + C8 ^ 2 + C9 ^ 2 + C10 ^ 2 - 10 * AVGC10.1 ^ 2) / 10)

This would eliminate results where the only reason the Condition Formula returns true is that the Bollinger Bandwidth is already zero.

Modelling Bollinger Bands (& Standard Deviation) in a TC PCF