Volatility cones sometimes called probability cones

Guys,

Does anyone know how to model volatility cones? I’m struggling with this. Can someone help me or point me in the right direction?

Thank you!

As I mentioned in another post, if this “methodology” uses standard deviations, it’s purely descriptive of the sample at hand and can’t offer much “predictive” utility. There would be a different approach depending on whether you want to describe the data set at hand or have some statistical reliability to the chart.