Interactive Brokers for the professional investor is hands down the best brokerage option, but the emphasis on account security, through requiring custom alphanumeric security codes for every login is a little tedious. These numbers match a physical card, custom made for you.
You can waive this but then they profess no liability for hacked accounts in the event you do. A software update in the last few days allows the mobile app to have “read only” access to your real time quotes now. This psychologically might have the effect of me trading more given the ease of checking now. It removes the last obstacle to making this a seamless mobile trading experience. Nice job IB.