What is the advantage of trading through a broker dealer? Are you trading in very large lot sizes if so at what lot size does it make sense to use one?A follow on question.....what is the % if you include all of your paid services, data feeds, platforms, etc. ?
For example my option trading portfolio commission is high (partially due to the fact that I'm with a broker dealer and have to trade through them) but I pay 0 for data/platform, etc.
Thanks.