But... in not less than two scenarios this feature is useful: backfilling additional bars soon after settings improve (if you enlarge 'quantity of bars to load' in File->Database Configurations dialog You will need to force backfill for symbols which were backfilled Formerly with smaller amount of bars) Reputable data feeds https://datafeedforamibroker97429.blogchaat.com/35249532/5-simple-techniques-for-amibroker-data