But... in not less than two scenarios this feature is useful: backfilling more bars just after options modify (when you enlarge 'range of bars to load' in File->Database Options dialog You need to drive backfill for symbols which were backfilled previously with lesser variety of bars) The set up wizard https://data-feed-for-amibroker97429.blue-blogs.com/42637030/helping-the-others-realize-the-advantages-of-data-feed-for-amibroker