Agreed, Sierra Chart, however you feed it is good.
Quote from MACD:
Opentick data feed is free depending on what markets you need. If you need more market data real time then OpenTick has very reliable data available at lowest prices anywhere.
www.opentick.com
Quote from tier1:
This is actually kind of silly, but within Ameritrade, they have real time charting platforms, a lot of indicators included and what have you. The data is reliable so far. I use it daily. And to boot, having an account with them is zero maintainence fee, so the charting tool is free as well. Once you log into your account, you launch the platform and its a separate program from the browser and in Java. It actually is much more reliable than Esignal in my opinion, and its free. They have Command Center, Strategy Desk and Advanced Analyzer. I use the command center and I get real-time charts all the bells and whistles for no extra charge.