But... in not less than two scenarios this feature is useful: backfilling more bars just after options modify (whenever you enlarge 'range of bars to load' in File->Database Options dialog You must force backfill for symbols which were backfilled Formerly with smaller amount of bars) The set up wizard generally https://datafeedforamibroker08530.blogerus.com/57240039/little-known-facts-about-data-feed-for-amibroker