The /ES looks to open around 1589. It closed yesterday at 1593, hit an overnight low of 1592 and a high of 1595 at 0745hrs this AM.
$MRK is trading lower after coming out with earnings and it appears to be lower due to disappoints with its drug pipeline. It closed at 47.00 and hit a low of 44.00 in the ETH and looks to open around 44.90. That 45 level looks to be key support. I really have no idea on how this one might trade today.