But... in at the very least two cases this feature is useful: backfilling far more bars following configurations modify (when you enlarge 'variety of bars to load' in File->Database Settings dialog It's important to force backfill for symbols which were backfilled previously with scaled-down number of bars) Reputable data feeds https://data-feed-for-amibroker00864.designertoblog.com/66394452/amibroker-data-can-be-fun-for-anyone