Hi Robert! I wish I could point to it or upload it, but it is historical commodities data from http://www.barchart.com/ and I just tried to access the data without logging into my subscription, and I can't. If anyone else does have access to it, though, it is the 'Format-N' version of the data that I chose to process. Each line in the file consists of 8 fields, separated by commas (essentially a CSV file): contract,date,open,high,low,close,volume,openInterest here is an example: A62005U,050909,0.7726,0.7758,0.7703,0.7737,12366,0 Having said that though, there must be a free source of historical information for commodities data... I just haven't found it yet. -- Glenn Robert Klemme wrote: > Hi Glenn, > > this sounds like a challenge! I'd love to get my hands on the input and > the spec what you want do do with the data to see whether I can find an > even faster Ruby implementation. If your data is not private that is. > Alternatively you could maybe anonymize it... > > Kind regards > > robert