Buy and hold died. Follow the gurus cautiously. Some are blind. Buy dips. Buy momentum. Market is unknowable. Food always in demand. Energy too. Charts are like statistics: they can say whatever you want. Momentum + price action for swing trading.
In 1968, I began as an analyst for Charlie Munger and Warren Buffet who launched buyouts for undervalued companies. I follow their same model of buying value that is understated in the markets.