First post, so there may be glitches.
Recent strength in the US markets is disguising a global distribution pattern. Look at EEM, BKF (BRIC countries), FXI (China), DAX and the UK and there are clear distribution patterns with lower highs and lower lows over the past weeks. Behind its strength the US also has a mild distribution pattern. My favourite distribution indicator is NYA50R (NYSE stocks above 50DMA). Below is a classic NYA50R distribution pattern from October 2012, and the current pattern.

- NYA classic.png (14.72 KiB) Viewed 3763 times

- NYA current.png (6.06 KiB) Viewed 3763 times
The notation on the classic is a bit like Elliott Wave, but without EW rules. The blue line is the 20DMA. It's rare to get a precise match with the classic, there's usually distortion. Obviously the patterns aren't a great match this time around, but it's possible to see the current version as mild distribution with a lot more bullishness involved due to QE. This interpretation is also supported by the current shape of the NYSI curve.
If we are in the distribution phase then we probably hit point D last Thursday, or at least D1, there are often two Ds. The big fall, or mark-down phase, would be from point D2 down to E. It's unlikely that a big fall would start before Opex. I've spent some time researching when big falls start and just after Opex is far more likely (like 5 to 1) than just before Opex. On this basis I have a suggested timetable for reaching point D2 and the big fall. Happily it coincides with Uempel's ellipse post from Friday, suggesting 22 April.
The timetable goes like this...
Early next week: Most of the world's markets follow their current wave pattern and fall for days. The US and Japan might not (EWJ Japan is currently parabolic). It's probably not critical what the US does early next week. But NZD currency broke its parabolic rise on Friday and it's preferable that this stays negative (a parabolic and break for NZD is sometimes a sign of imminent mark-down).
Late next week: Maybe a slight rise in the US and consolidation in world markets to signify point D2 on the NYA50R pattern.
Opex Friday or the following Monday or Tuesday: A global breakdown begins. It will be significant if EWJ Japan breaks its parabolic rise around this point. NYA50R should quickly fall below 60. As final confirmation that the real fall has begun I'd expect SPX:VIX, to fall sharply below 110. Right now it's 131. The subsequent mark-down should last a couple of weeks.
Of course the markets never follow my timetables and break my patterns more often than not. But there are some mileposts along the way for this journey and if they happen and we do get a D2-E fall it will be worth shorting. I'll be watching the mileposts myself as the chance that I've got the timetable exactly right is low, but I think a 50:50 chance that something vaguely similar occurs.
Many thanks to all the regular posters. I've learned so much from you.
I wouldn't normally post, but everybody seems a bit short of ideas this weekend, so I thought I'd at least stir things up.