[pcabc]

US:
Interesting to note the upward short term trend in the AMEX advance decline line, as that can fall even in prolonged upward trends in the index.

10 years of the W5000 / AMEX chart.  Unfortunately that is all the data I have at the moment.  Also worth noting that the left hand edge is 2009, a sharp climb following the 2008 event.  The point I am making here is that uptrends in the AMEX advance / decline line are relatively rare.