Jesse Lauriston Livermore

"The game of speculation is the most uniformly fascinating game in the world. But it is not a game for the stupid, the mentally lazy, the person of inferior emotional balance, or the get-rich-quick adventurer. They will die poor."

"Trade only when the market is clearly bullish or bearish."

"First, do not be invested in the market all the time. There are many times when I have been completely in cash, especially when I was unsure of the direction of the market and waiting for a confirmation of the next move. Second, it is the change in the major trend that hurts most speculators."