[amibroker] Buy At Certain Time Of Day

[longarm61]

Hi, I'd like to know how to code a buy rule that applies for all but 
the first hour of the day--IOW, buy signals are ignored from 9:30 to 
10:30.  This only applies to the "OR" line in the following code:

Buy =   blah, blah, blah, blah; 
        OR Low < MA(  Close , 10 );

Any help would very much be appreciated.  

Thanks,

Grant