Following a major bottom or correction, this may indicate strength of the recovery. Nearing a peak or new high, it may indicate an imminent mean reversion. The last time this happened (also on declining volume) was during the same 4th of July period 2 years ago (6/27/2011 - 7/7/2011).
It's also rare, if ever, to see a run-up built on as many Doji with gaps. To me, this is a setup for disaster. While I don't know for sure when anything's going to happen, Friday's Hanging Man (red circle) may be a good start. The confirmation required may come as a gap-down and/or a black Marubozu on Monday.
Edited by TechMan, 07 July 2013 - 11:27 AM.