Replies to post #134 on S&P 500 price levels to trade

[rimshot]

all the BB rules apply, not some of the rules
apply

https://www.bollingerbands.com/bollinger-band-rules

best charting habit for personal use is to always
select matching setting for %B and for Bandwidth
when using a BB on any chart
AND
evaluate the chart setup using all 3

Example = see BB squeezes in prior years compared to
that in 2018 for the A-D line of your choice ... here it
is significant what you choose for the BB setting

FYI