Some fundamentals of stock trading

"People don't seem to grasp easily the fundamentals of stock trading. I have often said that to buy on a rising market is the most comfortable way of buying stocks. Now, the point is not so much to buy as cheap as possible or go short at top prices, but to buy or sell at the right time. When I am bearish and I sell a stock, each sale must be at a lower level than the previous sale. When I am buying, the reverse is true. I must buy on a rising scale. I don't buy long stock on a scale down, I buy on a scale up."

(Edwin Lefevre - "Reminescences of a Stock Operator")