Answer
The best platform is really a matter of opinion. Some like to see certain types of graphs & charts, others like tables, and still others like things like streaming video, RSS news feeds, etc.

So, a customizable platform, arranged the way you want, would be your best option. You can select the exact data items displayed, the size and color of any charts and tables you want, as well as things like heat maps and suggested trading strategies right on the screen.

Good platforms that can be readily customized usually come with no charges if you have an account with a reputable broker like Fidelity, Ameritrade, Schwab, E-Trade, and Scottrade.