But... in a minimum of two cases this selection is useful: backfilling a lot more bars right after settings alter (when you enlarge 'number of bars to load' in File->Database Configurations dialog It's important to pressure backfill for symbols that were backfilled previously with scaled-down amount of bars) Reputable data https://amibroker-data-feed75319.myparisblog.com/35756582/the-smart-trick-of-amibroker-data-that-no-one-is-discussing