Originally posted by Lobster
Last year, I started trading with one of the online brokers....I lost 80 cents (PER SHARE!) on ORCL because my "free" market order was messed with by SOES. Actually, SOES always gives you 100 "token" shares at the quoted price, but the rest is filled at the least favorable price that happens to come along within the next few minutes. ........
As soon as you use market orders, even the most advanced routing capabilities might hand your order over to SOES or a specialist where you will eventually get screwed big time......
Originally posted by DATTrader
I think you have your SOES rules a little mixed up....or perhaps you mean IB BEST when you say SOES and maybe that is the mixup, since I do not know how the IB BEST algorithm works.
Your first point is not necessarily correct. If only ECNs are at the inside offer than none of the order would fill since there has to be a MM at the inside offer for any of the order to execute.
Your point two is incorrect (again I am assuming that you mean the whole order is routed to SOES at this point by IB BEST) since the entire order would execute instantly up to the posted AND reserve volume that the MM's had to sell. So if there are MM's at the inside, the order executes instantly. The only time a SOES order is "held up" is when there are no MM's at the inside price. However since MM's are very good at defining a short term top, you are correct that often the MM's will stay away from the inside and then come in to sell when they think the short term momentum is subsiding.
Finally I am not sure what you mean about cancelling the market order...perhaps again this is an IB BEST issue but you can certainly cancel a SOES order anytime prior to it being filled regardless of whether it is limit or market. Hope that helps clarify some of these issues and I would like to hear more from those that use IB BEST to help clarify things more.
Originally posted by DATTrader
Lobster...as Vinny1 pointed out on this thread...you appear to have a flawed understanding of SOES. There is little likelyhood that an online broker would ever direct a customer's market order to the SOES system since they could not control who takes the other side of the trade as it autoexecutes against the ranking MM at the inside price. In reality, the online broker either takes the other side of the trade themselves or sells the order to a MM who will take it in order to capture the spread. Regarding your other point about the "token 100 shares", I am copying my response to your post on another thread from a few days ago, with the goal of clarifying some of the information for Halycon about SOES.
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