The trouble with Technical Analysis
When I did a course on TA, a couple of Americans came over to NZ and started off with a few rules about the size of the companies that you monitor. At that point they were able to tell us, don't worry about moving the market, because you won't.
If those rules were applied to NZ stocks, Telecom would probably be the only stock that would qualify for trading using TA.
I do believe that you can use TA to identify buy and sell signals with stocks like NZO, but I am concerned that we can move the market and the signals can become self fulfilling prophecies. If a handful of us put a stop loss sell order at 150, once 150 is reached there could suddenly be a few million shares for sale at market price, and there may not be enough buyers before we get to 100. This effect could already be causing the volatility that we have seen.