Why did I love this book?
The subtitle is The Untold Story of the Scientific Betting System that Beat the Casinos and Wall Street. This book is an easy-to-read narrative of the intersection of the grimy underbelly of betting--with high-minded math. It reminds you that trading is not conducted in a clean little bubble. Technical analysis can give you an edge, but trading is still engaging in battle with opposing forces; strategy and tactics can count as much as building an elegant technical system.
Your opponent on the trading battlefield will try to trick you, like a general in real warfare. He may keep selling and selling after you have bought, triggering a sell signal in your trading system. He is hunting for your sell signal. The mechanical response is to sell—your system says sell, and you should follow your system. To exit a position when the market goes against you is named a stop, and everyone should always use a stop. Stops are a function of the market action you see on the chart, but they are also a reflection of your capital at risk. Here’s the hard part—the other guy is hunting for your stops. You know he is hunting for your stop. He knows you know he is hunting for your stop. This is now a game.
Famous trader Victor Neiderhoffer said he didn’t use stops because the market would go hunting for them. He’s right—stop-hunters abound. But it’s a lousy excuse not to use stops and Niederhoffer went out of business several times. (His book Education of a Speculator is not on my top 5 list but it’s a good book.) Many top traders like Niederhoffer are also experts at games—squash, fencing, chess.
Not to sell when your technical signals dictate is to risk catastrophic loss. But you suspect that stop-hunter is bullying you into selling. This is infuriating and gets the blood up. It also means your sell signal is incorrect because this is not a normally functioning market on which your trading signals are based, but a temporarily deranged one because of the stop hunters.
You need gaming rules to outfox the trickster. What is the stop hunter seeking? A lower price to buy. So give it to him. Execute your sell order but re-enter after he starts buying again. In my own trading, I have Rule 3: re-enter in the same direction after your original entry gets hit the second time on the way back up. If your stop was on the small side and your profit target is bigger, you will end up with a net gain. Taking a loss needs to become normal, routine, and not a pause for panic. It’s not taking losses that is bad—it’s taking losses bigger than you can afford and that are not offset by gains.
Bottom line, we all need to remember the other guy is out to get your money. When studying charts, it’s hard to keep that in mind. The Poundstone book opens up that gaming world, and it’s a world in its own right.
1 author picked Fortune's Formula as one of their favorite books, and they share why you should read it.
In 1956, two Bell Labs scientists discovered the scientific formula for getting rich. One was mathematician Claude Shannon, neurotic father of our digital age, whose genius is ranked with Einstein's. The other was John L. Kelly Jr., a Texas-born, gun-toting physicist. Together they applied the science of information theory—the basis of computers and the Internet—to the problem of making as much money as possible, as fast as possible.
Shannon and MIT mathematician Edward O. Thorp took the "Kelly formula" to Las Vegas. It worked. They realized that there was even more money to be made in the stock market. Thorp…