what is an at the opening order 
an at the opening order instructs one s broker to buy or sell a security for their account right at the very beginning of the trading day if the order cannot be executed at the opening of the market it will be canceled the bottom linetraders look at many different variables when they re making their investment decisions the opening range is one of those tools this is the high and low price of an asset shortly after the market opens the or helps traders because it can help them understand the tone of the trading day ahead in terms of market sentiment and price as such it s an easily understood strategy with identifiable entry and exit points 