Yes, not quite sure how it works and curious of any feedback you might have gotten from IB.
Entered several orders lately from 300 to 500k on treasury bills and notes 1 year out, could buy at the ask except today, tried 2 different expiries on T Bills with 300k but nothing happened.
From here tws is dodgy and I thought this might be linked to the internet connection while the order went through, but even after restarting TWS, it shows orders weren't hit.
Also if i put an order midpoint on T bills it doesn't show on tws as a new bid, not sure what's going on (market data issue possibly, destination is smart, which is the only choice the system gives me)
USD cash with IB over 10k is now paying 1.68% btw, not negligeable.