Now that TOS is going away I am concerned about my trading spreadsheets, which I rely on every day. I have built a lot of spreadsheets and written a lot of VBA code using ThinkOrSwim's real time DDE feed both for futures and stocks. Does TD Ameritrade or any other broker offer real time quotes through excel DDE? I'm not interested in Interactive Brokers as they charge exchange fees which can add up if you're looking at multiple exchanges.
Where did you see the TOS app is going away? According to their integration FAQ, the TOS software will continue to be offered.
I think the TOS software, including the DDE, is one of the things that TDA wanted when they bought them. So while their service level and quotes are suffering I donât see any reason to worry about your spreadsheets.