I couldn't figure out what an island NASDAQ fee is. Can anyone help? I have averaged about 3.2 million shares per month for the last 5.5 month since I've started using IB. So pretty much if I switch to Unbundled, I will get to pay 0.002 + exchange fees instead of 0.005. In the examples, they show an island nasdaq fee for shares trade with "remove liquidity". What does this mean?