I think the target Onischka's looking at depends on the high we get off the b-wave up. In this case, if the b-wave ends at 1203 NDX or so, the C-down would be either 1170 or 1150 if C=1.618 x A. 1150 is the target area of the 60-minute H&S from the past few days, but considering the strength of the market, 1170 might be just as likely.
If we're just finishing up the wave 5 off the lows May 20, we could really go all the way to NDX 1212 before turning down. That might work better for a lower re-trace target than the 1203 level would e-wave wise.