R provides an easy way of pulling near-real-time stock data directly through API using the quantmod package:
With the quantmod package, it is really easy to pull historical data from Yahoo or Google finance with a single line of code:
Besides pulling historical stock data, quantmod also provides various visualization functions for exploring the data. The following command creates a bar chart and chart series for the Amazon stocks:
Here, TA="Null" indicates not to use any technical indicator.
This package also provides ...