Can I log in to the classic site and PRO at the same time? February 27, 2020 07:27 Updated You can only log in and use either of one of the two trading platforms at a time. Related articles Are there fees for using the PRO platform? Is there a mobile app for PRO? I currently cannot meet your existing criteria, is there a subscription plan for PRO? What are some of the new benefits/features of FirstMetroSec PRO? What is a Stop Limit?