The field definition for ACVOL_UNS reads " Unscaled accumulated number of shares, lots or contracts traded according to the market convention "
What does unscaled mean in this context? How does the volume reported differ to e.g. the Volume field in Tick History (definition " Accumulated number of shares, lots or contracts traded according to the market convention ")
What scaling process happens to get from one field to the other? How can I scale values from the ACVOL_UNS field such that they reconcile with the Volume field?