The application I'm focusing on is MetaStock, a stock charting program. MetaStock has no ability to allow saving a chart data to disk. If you click on a graph line, however, you can then hit Ctrl-C, and this copies the data to the clipboard.
One can then paste into Excel, for example.
The data being copied would be a time-series of numbers, say Date, Price, Volume, etc. And extend over time, daily, from the present going back perhaps ten years. That's a whopper of data.
And I'm copying many such charts at once, having everything go to ClipTrap. Then having your ChoppingList divide it all up (by way of delimiter XXXXX).
Then I import these files as needed into Excel.