But... in at least two situations this selection is beneficial: backfilling extra bars right after configurations alter (any time you enlarge 'number of bars to load' in File->Database Options dialog You should power backfill for symbols which were backfilled Beforehand with smaller sized amount of bars) The data feed is https://amibrokerdatafeed53085.59bloggers.com/35618860/not-known-facts-about-amibroker-data-feed