Metatrader 4 is a very popular (and free) trading platform which is used mostly for trading forex, although increasingly brokers are enabling the trading of other classes of instruments.
Sentient Trader is fairly unique in that it can access historical and live streaming data from MT4, although as the technology that MT4 uses to distribute data (which is not after all its primary purpose) is slightly old there are a few tricks that you need to get it working smoothly.
Please watch the following video which takes you through setting up a Chart using MetaTrader 4.