From the link:
The all-important long-term breadth indicator – the McClellan Summation index — is on its fourth day down, making it obvious which side of the market to be on, but even more telling is that this is a wind down that began nearly two weeks ago on the first day down from the bounce top on March 12th (see the chart below).
There is a lot of stuff going on that could have led to this drop — Trump, Trump’s tariff plans, Trump’s saber rattling, Trump’s staff members bailing as fast as they can, the Trump chaos (we have a sitting President in litigation with a porn star and so far she and he lawyer are kicking his and his lawyer’s butt), uncertainties springing up everywhere; and the Fed is raising interest rates.
All that is taking a toll of course but this a market that has been moving up too far and too fast so the last two weeks were at some time inevitable.
For the chart and what comes next: