Not all users were migrated with Schwab/TDA yet. I know that I will not be migrated till sometime next year and my data currently works.
I did open accounts with IBKR for their margin rates. Schwab/TDA has horrid margin rates. That and fills have gone downhill since roughly the pandemic. my guess is due to PFOF... not to mention lag under heavy load.
I am a long time ToS user and wrote or heavily modified most of the tools that I use daily. ToS is long in the tooth, but super easy to script for with a little digging.
...It is sad to see a great company (TDA) get taken over by a just ok company (looking at you Chuck)...
I am glad I found this thread as I did not know that there was going to be an issue at the time of transition.
FWIW- I currently use CQG data for futures. And TDA and IBKR for stocks, etc. Neither of which are as fast as my CQG feed (and my old Denali feed on Sierra). ToS data, while free, it's not the best And can throw studies off with their dirty data.
Well it looks like I will be giving TradeStation a visit soon to make up for the loss of TDA... ugh.