Trade functions are functions that simulate trades when applied to an appropriate dataset (that is one that has the columns and other features needed by the trade function, as it was set up in the trade wizard).
We have provided a number of simple trade functions, primarily as a template for you to use. Simply edit one of them in the trade wizard, and modify it as you please. The trades are all packaged in a single zip file , trade.zip. Download this to the "Trades" subdirectory of the FDC directory, and unpack. Discard any trades that you do not want to keep.