[pcabc]

Sector breadth

US & momentum
       

The black colouring is indicating some features that showed up on NYSE breadth data just before the 1987 crash, mainly with respect to the Weinstein momentum versus some of its MAs.  Unsure if this is significant in terms of breadth here, but it is not a sign of strength.  The red outlining on a few black boxes shows that they have been in this condition for more than a couple of days.  That is, they are more likely significant, less likely to be transitory noise in the data.

UK
   

Commodities