I want to mention some points which could help opening a short position in the NAS100. There are two opportunities:
1. the NAS hits the 7140 Points and starts going down to the 61,80 Fibbonacci Retracement.
2. the NAS gets enough buying momentum and goes up to the next resistance level (7310) and from there moves to the 61,80 Fibbonacci Retracement ( there would be my Take Profit)
To start a short trade look at the RSI, if its just dip the trend line opportunity 1 gets more likely.