Hi
MFP can run triggers at a top market refresh rate of 0.2 seconds. From my experience the best refresh rate for using the Excel link is about 1 second.
The Excel link adds loads of flexibility and the possibilities are almost endless; cross-market arbs, connecting to external data feeds, statistics, charting, customised selection databases, ratings, tipster lists, statement analysis to name but a few.
You can read data from Excel and there is a trigger action to write data to Excel, plus what are known as "Custom Cells" for putting data in the same cell for each selection etc. There is a section in the helpfile on the Excel Interface. A simple trigger condition would be:
and selections trigger expression cell_sheet1_F2 is between 10 and 20
i.e. the condition is met if the value in cell Sheet1!F2 is between 10 and 20