Doing a bit of research into my archived 60 minute NDX charts. I have 5 instances since mid october 2002, where the NDX stochastic has risen to or above the 80 line and then dropped to the 50 area and reversed up. the drops that followed after approx one day rise (satisfied on thursday) were:
days in drop....pts in drop...next day open
1...15...+5
2...50...+15
3...90...-15
2...38...-5
1...46...-32
in all cases the next day, or in this case monday closed negative. the avg time of the drop is a little more than 2 days and 47.8 pts. So unless the pattern breaks, it should be quite safe to put any opening strength with a hold to the close on monday at a minimum.
steve