But... in at the very least two scenarios this option is beneficial: backfilling additional bars just after configurations transform (any time you enlarge 'amount of bars to load' in File->Database Options dialog You will need to power backfill for symbols that were backfilled Formerly with more compact variety of bars) https://charlieqrrpn.gynoblog.com/34271016/the-basic-principles-of-amibroker-data-feed