Last weekend I suggested that NDX may try to fill the open gap? in the event NDX reversed in my highlighted zone and was rejected solidly again by the trendline which now clearly shows solid resistance. The fall last week suggests intermediate wave may be underway and initial targets are the support lines at 6635 and 6172 IF the last low at 6641 is breached.
However given that this is a seasonal strong time of year it is prudent to tread carefully as a snapback rally surprise cannot be discounted!