Very handy tool! Do you perhaps know how to get the data and more specifically the Adj. Close field into Excel? Thanks
Stumbled upon this post on Rebol. So here's my contrib, if you want to parse Google Finance Historical Data, it's easy: Rebol[ title: "Parse google finance csv file" author: "http://reboltutorial.com/blog/parse-csvparse-csv/" version: 1.0.0 ] symbol: ask "symbol: " url: rejoin [http://www.google.com/finance/historical?q= symbol "&output=csv"] stock-data: read/lines url close-block: [] foreach element stock-data [ last-quote: parse/all element "," append close-block pick last-quote 5 ] cum: 0 for i 2 21 1 [cum: cum + to-decimal close-block/:i] average: cum / 20