TradingView is an in-browser platform for charting and monitoring currencies as well as other assets. Its charting tools are also available for use directly in the trading interface. In addition to charting, you can share your trading strategies and broadcast real-time analysis.
As for the free features, TradingView is a powerful tool for traders with any level of experience. The basic features should be enough for most of them. However, be careful when studying other users' ideas and broadcasts. It's important not to blindly follow someone else, but to find the kind of information that will add value to your own strategy.