looks like a decent drop did develop and that your BB prediction played out accurately.
props for that technique working out and for sharing it with the board. as posted a while back, i had given up on BBs a couple years back, as they didn't seem to be helping much.
but i was using them on 2/5/10min charts. using them on longer term (eg: 60min) does make logical sense and certainly seems to be useful for tracking SPY.