+ extra safety versus halting backfill when user scrolls by means of symbol listing and invalid ticker is encountered + IB API error message one hundred sixty five is used now to detect When backfill is obtainable or not (demo account for instance would not offer you backfill) Connectivity: https://datafeedforamibroker53074.suomiblog.com/a-secret-weapon-for-amibroker-data-44610248