Frugal Millionaire (a pseudonym) is a personal finance/investment blogger at 1stMillionAt33.com (http://www.1stmillionat33.com/). His profession is in engineering, and he works on the latest technologies in the fields of computation and communication. His personal investments focus on precious metals, energy, and commodity in general. He is a Stanford, Johns Hopkins, and University of Southern California alumnus, holding post-graduate degrees from the first two universities.
Harold L. Vogel, Ph.D., CFA, is CEO of Vogel Capital Management in New York City and former Adjunct Professor of Finance and Economics, Columbia University Graduate School of Business. He is author of Financial Market Bubbles and Crashes, 2nd ed (2017), Entertainment Industry Economics, (9th ed. 2015), and Travel Industry Economics, (3nd ed. (2016). Articles include "An Analytical Review of Volatility Metrics for Bubbles and Crashes (with R. Werner), International Review of Financial Analysis, March 2015.
I trade very infrequently, and if you are following my advice you are probably making a big mistake. :)
My primary strategy is to enter into triple leveraged bull ETFs after big market drops, but only after the markets have given compelling evidence that the slide is arrested and an uptrend will resume. That usually means a higher high needs to be made and a clear rejection of the downside trend. Yes I try to catch the falling knife...