I have been charged several hundred dollars by IB on my activity statement under "unbundled" fees, which they said comes from exchange charges primarily from removing liquidity--something I have never had or heard of before. They directed me to their website under fees or commissions, under exchange fees and I saw it says there are such costs on certain options exchanges like BOX for adding & removing liquidity. I was wondering if the option under configurations--> options where there is achoice called "consider cost when routing" will help in regards to this problem. I hope someone can help.