Hi
MarketFeeder uses TDateTime format, i.e. number of days since December 30th 1899. The fractional part is the time of day. Details of this are in the help file.
so ball park conditions for November 2016 would be:
selections trigger expression event_start is between 42674 and 42704
and markets name contains "Chs"
or you could use variations of the above and, markets name does not contain ...
Also you can try the FIND function:
selections trigger expression FIND("Nov Chs", "market_name") is greater than 0
...or greater than x where x is the start character number in the string "market_name" if that makes sense.