But... in at least two instances this option is helpful: backfilling extra bars just after configurations transform (any time you enlarge 'variety of bars to load' in File->Database Options dialog You need to force backfill for symbols which were backfilled Earlier with more compact quantity of bars) The data feed https://amibroker-data-feed53086.bloggerchest.com/35081441/the-basic-principles-of-amibroker-data-feed