The stock market for all of May has fallen after the first four months of the year rebounding from a 10% correction at the end of 2018. It is obvious that the market has run out of steam and without a catalyst, the market could easily give up another 10% correction.
The sell signal that will presage that kind of event is a breakdown of the 200 day moving average. This breakdown for the S&P500 is only 1% away at 2,770. From a technical point of view this is a significant number and will trigger selling by traders and investors. Any more deterioration of the trade process with China will cause stocks to fall.
Therein will lie opportunity as the economy is healthy.