If the gap holds as near term support, a 50% re-trace to that area would project NDX 1015 as the top today. I'll be short there, as it's only 15-points from what I think is the max upside for this ramp.
IMHO, considering the effort went into turning the market around yesterday (actually the process started a couple days earlier if you look at the junk stocks), they may ramp it for a little longer yet. It's a mistake to try to catch the bottom, an even greater mistake to try to see tops in a ramp after missing the bottom. JMHO