Buying in a bull market

"Let us suppose, for example, that I am buying some stock. I'll buy two thousand shares at 110. If the stock goes up to 111 after I buy it I am, at least temporarily, right in my operation, because it is a point higher; it shows me a profit. Well, because I am right I go in and buy another two thousand shares. If the market is still rising I buy a third lot of two thousand shares. Say the price goes to 114. I think it is enough for the time being. I now have a trading basis to work from. I am long six thousand shares at an average of 111-3/4 and the stock is selling at 114. I won't buy any more just then. I wait and see. I figure that at some stage of the rise there is going to be a reaction. I want to see how the market takes care of itself after that reaction. It will probably react to where I got my third lot. Say that after going higher it falls back to 112-1/4, and then rallies. Well, just as it goes back to 113-3/4 I shoot an order to buy four thousand at the market of course. Well, if I get that four thousand at 113-3/4 I know something is wrong and I'll give a testing order that is, I'll sell one thousand shares to see how the market takes it. But suppose thatof the order to buy the four thousand shares that I put in when the price was 113-3/4 I get two thousand at 114 and five hundred at 114-1/2 and the rest on the way up so that for the last five hundred I pay 115-1/2. Then I know I am right. It is the way I get the four thousand shares that tells me whether I am right in buying that particular stock at that particular time for of course I am working on the assumption that I have checked up general conditions pretty well and they are bullish. I never want to buy stocks too cheap or too easily."

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