Quote from Bitstream:
no it doesn't: only lmt or mkt on open or auction do go into effect right at open.
Quote from allstarmoney:
thanks bitstream. if i place a limit order, is smart the best way to send the order? is it worth placing limit orders in pre-market monday morning to get a better fill? does it make a big difference if i place the limit order right away on saturday morning versus sunday night?