Adding regular trading hours to a stop

The little box next to the clock in the portfolio window won't allow a click and neither will the box for allowing trading outside regular trading hours in the order page. The desired sell stop is on the e-mini, ES. Help?

 

Could it be that IB has not defined "regular trading hours" for ES? In that case it depends on you what times you consider "regular".

 

Since ES doesn't really have regular trading hours, you could use a conditional.

 

US Session in most of cases is able to give you more profits than Asian or European...

 

Well when I place the stop at about 10 pm pt it tells me it’s not executable until 8:30 am ct. how do I get it to execute if needed in the early morning hours?