1. Your broker can only route to a trading venue. You can't route direct to Citadel, but if you are on Citadels smart router it will choose where they want it routed and this will depend on your deal with Citadel. It can go to any number of trading venue
2. Smart routers will route to a lit or dark environment.
Most firms will smart route to a MM on the venue they choose.
3. If that MM is not at the NBBO they either most move to NBBO or ship to the NBBO - very little ship.
4. You can price improve the NBBO and this most likely to occur in a nonpayment environment
5. With very rare exceptions you can't violate NBBO and the order can't sit at the venue if a superior market exists as it will ship to the superior market.
6. HFT and what you see as quotes being lifted ahead of you has more to do with private feeds and an antiquated SIP - non PFOF orders get just as poor treatment.
7. The father of the modern Intermarket Trading System was Bernie Madoff.
2. Smart routers will route to a lit or dark environment.
Most firms will smart route to a MM on the venue they choose.
3. If that MM is not at the NBBO they either most move to NBBO or ship to the NBBO - very little ship.
4. You can price improve the NBBO and this most likely to occur in a nonpayment environment
5. With very rare exceptions you can't violate NBBO and the order can't sit at the venue if a superior market exists as it will ship to the superior market.
6. HFT and what you see as quotes being lifted ahead of you has more to do with private feeds and an antiquated SIP - non PFOF orders get just as poor treatment.
7. The father of the modern Intermarket Trading System was Bernie Madoff.