The Nasdaq Futures (Charted Below) just put on a Bearish reversal signal. I can not express enough how much caution should be warranted in the market place at this present time.
Everything is extended and overvalued. Many do not like to try and pick tops and like to chase breakouts. That is not for me. If that was for me you would have been buying yesterday and the day before, only to get swallowed (in my opinion) in the coming weeks.
This topping tail may be the start. Bearish Reversal Signal of the most Euphoric feeling this market has seen in many years. (since 2013 anyways)