As you may know, I have a Twitter account that lets me keep in touch with subscribers and other investors. In addition to “meeting” people that I never would have otherwise, it’s also a great barometer for stock market sentiment, which we consider a secondary (but still important) market timing indicator. This week, people were exclaiming with glee when the market was rocketing higher. Of course, I’m always happy to see the market in the green. But this unadulterated joy made me a little nervous. If you’re new to investing this may seem odd. But longtime readers will know...