The middle Bollinger band isn't really invisible, it is the sam as the 20 week moving average and has bee for quite some time, designating a strong and welll controllled trend. Pullbacks seem to be confined to middle bb, notice the long tails but a close hugging that middle bb earlier in the year. So,I don't expect the middle BB to fail on the first whack, we should see some strength to support it (JMHO)