You might need a dictionary to look up what equal weight means:
You actually just posted a chart that proves my point, IMO.
The weighted NDX closed yesterday 6% higher than the 1-26 high. The NDXE closed yesterday -.7% lower than its 1-26 high. The few carry the majority in this market right now whereas through 1-26-18 the weighted NDX was more balanced in its push to ATHs.
The market is still bullish, but I would be more bullish if the % change of the NDXE was closer to that of the NDX. Since they are out of sync, I am willing to play the short side a little earlier than in the past.