There is now only one crucial call to make in the stock market: What is the Trump Presidency going to do to the stock market?

Nvidia’s earnings don’t just move markets—they are the market. The latest results, due Wednesday after the closing bell, will represent more than a marginal company update. They’ll provide a litmus test of whether the artificial intelligence trade has room to run,

While nobody can predict what the market will do, especially in the short term, some metrics suggest that a downturn could be on the horizon.