Quote from hmap1:
Thanks for the response. So proactive outside of its own book? YUK! If I want that I can go to Arca. I like the fact that Island/Inca do NOT do that. It depends on trading styles. Also, will they be accepting odd lots? I really wish they would stay in their own book for speed!
For order executions, you will see the same speed as you see now, or better IMO. I assume that they will continue to sweep their internal book first, providing the same speed that you see now. If there is NOT a matching order on their books, then you would otherwise simply have you order passively posted on their books for execution by someone else. Now with external routing, however, your order will be sent to whatever a matching order can be found, which will likely be a faster order execution than allowing your locking/crossing order to sit passively on the ISLD/INCA book.
The only real disadvantages that I see are the following:
1) If actively routed outside their books, you will be charged a higher ECN fee, likely 0.4 cps (like ARCA external routing) versus the 0.3 cps (for ISLD/INET internal fill) or a credit of 0.2 cps (for ISLD/INCA add liquidity passive order fill).
2) Your cancels may take a few milliseconds longer to confirm if you request an immediate cancel right after order placement. This should only be the case if you happen to request cancel during the initial external routing check or external routing order placement phase. I doubt this delay will be long enough to even detect, though.
The main disadvantage I see, if any, is the higher fee for routing to external books. Personally, I welcome this change and am looking forward to having a viable alternative to ARCA for proactive routing. Recently, ARCA has been pretty reliable, but there were times a few months back when their reliability was awful, and it affected my trading. Nice to have a backup, or better yet, ARCA might become my backup.
-Eric