For me I guess is that the down trend remains very much intact...

For me I guess is that the down trend remains very much intact and that nothing ever rises or falls in a straight line,
Also I would say that the shadow inventory appearing on the LME is a very positive sign showing that demand has finally improved and the traders are feeling confident of unloading there inventory on market.
And with gself's experience over the last 20yrs also tells me that during the last zinc boom a similar pattern occurred once demand improved and we all know the end result of the zinc price at its last boom peak.
As I mentioned previously, if Glencore are confident in the market turning into deficit sooner rather than later, then so am I .