[amibroker] Which statement is correct

[booker_1324]

If I wanted to buy the next bar at open after meeting 3 conditions, 
which statement is correct.

Buy = Ref(cond1,-1) and cond2 and TimeNum() < 155000; BuyPrice = (O);

or

Buy = Ref(cond1 and cond2 and TimeNum() < 155000,-1); BuyPrice = (O);

Thanks