Software will refresh data on Every single five seconds…… Rate updation is often seen having a Sector look at window….. It is because IB feed wasn't built as tick-by-tick and in no way meant to build time&revenue sequence, but alternatively solely to update TWS Screen grid. From the Amibroker, https://amibroker-data-feed32974.snack-blog.com/28925726/amibroker-data-can-be-fun-for-anyone