No Memory Trading Courtesy of TurtleTrader William Eckhardt

William Eckhardt, the great trend-following trader, has spoken forcefully about the idea of not having a memory in your trading:

“Suppose two traders, A and B, are alike in most respects except the amount of money they have. Suppose A has 10 per cent less money but he initiates a trade first. He gets in earlier than B does. By the time B puts the trade on, the two traders have exactly the same equity. The best course of action has to be the same for both of these traders now. Mind you, these traders have very different entry prices. What this means is that once an initiation is made, it does not matter at all for subsequent decisions what the entry price was. It does not matter. Once you have made an initiation, what your initiation price was has no relevance. The trader must literally trade as though he doesn’t know what his initiation price is.”

Don’t forget it.