relative to TDA. Often wonder when people say they can't get filled, is it their broker or MM's? Opened ETrade as alternative for when brokers restrict trading on a stock.
Here's free downloadable software I've used for many years, on occasion. Uses your brokerage account feed but also provides LII, Time and Sales, Charts, etc.
"Strategy Desk" software is LII doesn't refresh itself. I have to click on the ticker symbol in my portfolio to refresh it. Had a similar problem with TDA website data. LII top bid/ask didn't always agree with LI portfolio or even Level I bid/ask quotes. Complained to TDA but they never fixed to my knowledge.