It's because IB feed wasn't created as tick-by-tick and never ever intended to produce time&revenue series, but instead solely to update TWS Show grid. You'll want to question your brokerage/real-time data seller if they supply DDE website link. The DDE plugin now obtainable for AmiBroker permits to connection to https://datafeedforamibroker00864.izrablog.com/29449912/how-data-feed-for-amibroker-can-save-you-time-stress-and-money