I was looking at TradeKing's fees, and realized they actually would charge me less for the same trade. Ridiculous. Can I know what you mean by "adding liquidity" and removing it? I thought the whole point of tiered commissions was to remove worrying about that. Anyway, is adding liquidity pretty much selling at the bid?
It's quite the contrary about removing this worry, flat price will do that, removing and adding liquidity costs/rebates appear under the untiered pricing, each exchange has different costs btw. Selling at the bid would be removing liquidy, you usually pay for that. Adding liquidity is when your order rests on the book,like if you add a sell order at the offer, you usually get paid for that, hence sometimes negative commissions with IB. Besides yes, if you only trade the US markets and don't borrow too much from your broker, especially if you trade large lots, there are cheaper retail brokers than IB Also again, I have a harder time understanding teh untiered pricing of options than of shares, for instance when adding liquidity through BATS (possibly via smart) I might get -2usd commission on 100contracts but 70usd on 200. I've been puzzled a few times.