Home › forums › Chart Support › Select 2 points on a series for analysis › Reply To: Select 2 points on a series for analysis
For storing dataPoints after shift+click you can use click event along with window.event.shiftKey. Here is an example with zoom-Pan.
And for reading data from a file you can refer following threads and this JSFiddle.
How can I plot values from .txt file ?
Graph a CSV file