NASDAQ is very overbought and there is a huge RSI divergence. Additionally it is sitting at the top of a channel, forming a strong resistance. With the recent buying hype and people going long, it would make sense that they will bring the price down to cash in all the longs. Of course wait for confirmation, as this is NASDAQ and it can keep going up indefinetly. A pullback is expected, before more buyers come in. Similar situation for US30 and SP500.
You should probably ignore the SELL button on NASDAQ.