I did not see GNT's per Yahoo on Tuesday and Wednesday. Sorry to be nitpicky.
and on the other hand, my charts seem to show gnt's from last week (4/30 -1105, 4/29 -1310, -1442, .. quite a few, 4/28 -1176, etc)
in fact - if these are accurate - if i just threshold out for gnt's, the whole series seems to begin at 1:30 on 4/08 (-1122) and have been pretty regular since then, with climaxes (many big neg ticks) on on 4/13, 4/20, 4/29, 5/7.
which - perhaps not coincidentally - are just around the days of the bigger one-day moves on the tnx (though 4/20 preceeds by 1 day).