As is today's "plunge", Colin! I reckon you must be standing too close to the chart! NZO is a fairly volatile stock and you need to give it plenty of room to breathe. In the course of its current (8 month) uptrend, NZO has dropped by as much as 16% at times with falls of up to 22 cents. You are going to have to harden up! A 3 cent drop on a day when the market is down overall is meaningless, just market noise.
Only in the short term, Colin. Look at the big picture and unlax. If you really do insist on worrying, at least wait for NZO to break below its current confirmed trendline. You could start getting ready to worry when the OBV stops rising.
http://h1.ripway.com/78963/NZO68.gif