Why do they say that the constant volume bars offered by some data providers do not work well? So ... not all providers offer the same data?
Does anyone know?
Does anyone know?

Why do they say that the constant volume bars offered by some data providers do not work well? So ... not all providers offer the same data?
Does anyone know?
What is meant by this? I mean: why can't it close at same time intervals like price bars?bars close at different time intervals.

What is meant by this? I mean: why can't it close at same time intervals like price bars?![]()