Does anyone have a good understanding of how to read and interpret volumetric/order flow stacked bars?

Where can I find solid resources on understanding them and using them to determine the move of an underlying instrument? Are there classes on this, webinars? I know that these arent indicators but can help me confirm a move and improve entries. Any help is appreciated.

Thanks in advance.

search u Tube or google for how to trade or read order flow using volume footprint charting. volume footprint charting education is what your looking for. i would not pay anyone for that. there not likely any better of a resource than the free ones. hope it helps.