I have made a chart that shows the narrow bollinger band pretty well.
https://ipfs.busy.org/ipfs/QmQgSKQzoN6hjM3CVjGCpLd8TK7DvvEGDcenYTqdfkp1Fi
https://steemit.com/crypto/@bit4bit/bitcoin-daily-chart-bollinger-bands
or https://busy.org/@bit4bit/bitcoin-daily-chart-bollinger-bands