No prices, no names, and no trader bias. Is this chart a buy or a sell?

20130320 mystery

The reason I'm seeking your views is that the new "Client Sentiment" tool on the CMC Tracker platform shows that 88% of our clients with a position in this instrument are one way. This is an unusually strong positioning, and an indication that current sentiment strongly favours one direction.

The questions are:

1) Is this security a buy or a sell?

2) Which security is it?

3) Are the 88% buyers or sellers?

Answers in the comments box below please. A couple of clues:

It's a weekly chart

This instrument is commonly traded

I'll publish the answer, and the client positioning tomorrow, with accolades for the most accurate and interesting answers.