Jerry: I use the Edgerater app that has an API to TOS for real time quotes. The transition to Schwab was seamless for this app. I have ER running on two PCs, one PC has TOS/TDA running while the second PC uses TOS/Schwab. Both are working fine. ER does not provide the ability to trade from it but if you can figure out how ER connects to TOS at least we can get RT quotes into MT.
https://www.edgerater.com