The COT data (the same data collected by Tradestation) can be found ad downloaded from the CFTC site in raw excel or text format from various pages around:
http://www.cftc.gov/MarketReports/CommitmentsofTraders/HistoricalCompressed/index.htm
You
don't need Tradestation to get the data. In fact the excel files available with the link above are the ones used in the Eminiwatch site before Tradestation collected the data itself for their datastream. It's just that the eminwatch site has indicators in Tradestation so he gets the COT data directly from the TS datastream,
On the cftc site you will find the latest data as at 15-Jun-2010. (futures only 2010 excel - in the middle of the page on the URL above)
If you go to the eminwatch site
http://emini-watch.com/free-stuff/c...-of-traders-importing-data-into-tradestation/
click on the free code button and you can download some documents e.g. commitment of traders.pdf explaining which data to use - basically you will need to delete all columns except certain markets (listed in the pdf - he is not interested in wheat for example) , add certain columns to calculate net interest as % of open interest and make adjustments for margin requirements. This will require manipulation within excel, but once you have
worked out the data manipultion you can save it as excel macros to automate it each week when the data is published. In the documents you download you can ignore any mention of Tradestation if you don't have it.
I have attached just the first few rows of it, because it is too large to include the whole file.
Charlton