[isatrader]

I see that your YHOO chart shows 30MA on 27th is at 33.64, however the yahoo finance page shows 30MA at 32.73. MSN money website is 33.05. Why the difference?

The investor trailing stop loss should go below the 30 week MA and the previous significant swing low, which would put it further down below the October low anyway. However, if you are using the trader method then you should sell if it falls below the 30 week MA even by a fraction. See page 196 in the book.

The reason for the difference in the 30 week MA's is that stockcharts adjusts the data for dividends and splits, whereas Yahoo finance doesn't, and I don't know what MSN does. But in a previous Q&A with Weinstein, which can be found in the blog, I asked if we should use adjusted data, and he said that we should.