[amibroker] Non daily testing in a daily environment

[Nick de Peyster]

Hi,
 
Is there a way, using daily data, to test a system using non-daily 
frequencies?  I know that you can do monthly/weekly etc by changing the 
settings in Automatic Anaysis, but what about -- for example -- trading only on 
the third wednesday of the month? 
 
Or could you submit an ASCII file with a custom list of dates that are eligible 
for trading?
 
Thanks,
 
Nick