cleaning up lousy ticks (if you see a bad tick it's possible you'll attempt forcing backfill in hope that data seller has cleaned up its database and you'll get preset data - works nicely for eSignal that basically seems to repair lousy ticks after they occur) You should note https://amibroker-data53085.blogolize.com/considerations-to-know-about-amibroker-data-feed-67475960