StockCharts is an excellent value, I've used them for 15 years, they are really the only choice for Charts & Technical Analysis.
But it depends on what you want to do, StockCharts is the very best for the value on charts and technical analysis with lots of world class commentary. If you want an interactive trading platform then best to find a broker who provides that service.
Here's a couple of links to the different options available for the various levels of membership, from free to the top level.
I don't work for Stockcharts, I'm just another user always trying to learn more and willing to share what I've already learned. Stockcharts.com Support Forum
Register for free to join our community of investors and share your ideas. You will also get access to streaming quotes, interactive charts, trades, portfolio, live options flow and more tools.