But... in no less than two situations this option is beneficial: backfilling more bars immediately after options alter (when you enlarge 'range of bars to load' in File->Database Options dialog You need to force backfill for symbols which were backfilled Formerly with smaller amount of bars) The data feed may https://archeruvwwu.techionblog.com/35186848/not-known-facts-about-amibroker-data-feed