well based on the trading data someone is picking them up.
well if 430 is a goer, the SP will just go straight north and huge gap up, thats the game plan one would assume.
regarding the buy depth, it doesnt mean much unless you HAVE to sell and if you do they will pick it up but they will keep those sells bids on and as soon as they see one sell thats not there they play games to trick them into dropping lower into them,