Represents a collection of CQGConstantVolumeBar objects.
It is returned by the CQGCEL.RequestConstantVolumeBars method.
The CQGCEL.ConstantVolumeBarsResolved, CQGCEL.ConstantVolumeBarsAdded, and CQGCEL.ConstantVolumeBarsUpdated events can be fired for the CQGConstantVolumeBars.
