This information may or may not be helpful to you.

First of all, since I am unfamiliar with your product Tradestation, I
don't know whether you can address the Tradestation object in this
manner or not, I guess it will depend on whether it understands VBA or
not:
http://www.peltiertech.com/Excel/XL_PPT.html

Here is more information about using the clipboard:
http://www.cpearson.com/excel/clipboar.htm &
http://www.developerfusion.co.uk/show/46/2/

If you can not address TradeStation as an object, then you may need to
use the FileSystemObject (FSO) to get it open
http://www.tutorial-web.com/asp/fso/ and then use clipboard  API calls:
http://www.vbcity.com/forums/topic.asp?tid=51297

Unless someone else has a better idea?