I am trying to do a full comparison of pro's/con's of the various online brokers for option traders, a bit similar to the Barron's online broker survey, only here for option traders. Please share any information you may have about various brokers who: 1) offer price improvement 2) offer direct access platforms and smart order routing 3) have advertised options rates of below $1 per option trade 4) recognize all option strategies: 5) Other 6) Any special red alerts.