Do you have to login to both Interactive Brokers and DAS?

You don’t have to login to both since DAS also provides you with the market data you’ve subscribed to; so you can just log into DAS. But please note that DAS only loads Equity and Positions from IB one time each morning, so any trades made in IB’s platform won’t show up in DAS until the next day. We recommend that if you subscribe to DAS for IB, that you just use DAS if possible.