When downloading data using Tick Downloader, in raw tick data there are ask volumes and bid volumes, and in aggregated tick data (e.g., 1 hour) there is just volume. For the same time period, the tick ask and bid volumes do not sum to the aggregated volumes. The ask and bid sums are generally the same magnitude as the aggregated volume, but they aren’t even very close. How is volume computed in Tick Downloader? Thanks.