I couldn’t find a video from her, at first, but I did find several mentions of her Double Bollinger Bands system/strategy. Then searched that strategy and presto!
Here’s the nuts and bolts:
Ms Kathy Lien, a well-known Forex analyst and trader, described a very good technique for the Bollinger Bands indicators combo, namely, the DBB – Double Bollinger Bands strategy. In her book ‘The Little Book of Currency Trading’, she wrote that this was her favourite method. Originally, the DBB can be applied to technical analysis for any actively traded asset traded on big liquid markets like Forex, stocks, commodities, equities, bonds, etc.
This is how you apply it on your chart:
Insert the Bollinger Bands® on the chart
Go to ‘Settings’ and select two standard deviations and a 20 period SMA
Insert a second set of the Bollinger Bands® with a different color
Go to ‘Settings’ and select 1 standard deviation and a 20-period SMA
I got the settings here:
I’m going to give this a shot!