Trigger Logs

Sorry, this is probably a really dumb question but how do I stop my trigger logs ending up massive?

Say for example I plan to trade a football game in play. I log on in the morning set my triggers on with the games I want in the market watch and my trigger sits there all day checking if the market is in play and writing this to the log. I know I can turn off logging for a block so do I need to set one block up first and check if the market is in play and turn off logging for this block to avoid the logs becoming massive and make them easy to read?
Thanks in advance.

Hi
In the settings > monitoring options > market refresh > start monitoring events at...
if you set start monitoring events at say 5mins before the beginning, then the logging will start from then.

Thanks, I tried this and it didn't seem to work. 

I've turned on no triggering till x minutes before the event starts and that does appear to work.

Hi!

I also wanted to add that I recommend clearing the old logs by using the option "Clear logs older than ... days" in Logger Options.