But... in a minimum of two instances this option is useful: 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 scaled-down variety of bars) The data feed https://datafeedforamibroker19641.digitollblog.com/35002856/how-amibroker-data-feed-can-save-you-time-stress-and-money