Instruct: Classify Amazon reviews into positive or negative sentiment
Query: save your money

There are several problems with this book. First, it is clear that the authors know next to nothing about trading. One of the purposes of using technical analysis avoid the volatility of a buy and hold strategy, so unless you are comparing on a risk adjusted basis, the conclusion is meaningless. Secondly, the authors don't reveal the values they plugged into the indicators. Did they test a 5 and 10 day moving averages, or was it some other value? How did they arrive at the values they used? And the way they constructed their database was totally biased.