The Role of Entry in Trading Systems
In the study notes, entry is described as the last task in reviewing a trading system, yet it is the aspect that receives the most attention from most traders. This attention is often misallocated and comes at the expense of more critical components such as exits, position sizing, and overall risk management. The notes point out that it is possible to make money with a random entry system. In fact, few entry techniques have demonstrated reliability that is much higher than random entry, particularly when the holding period is 20 days or longer. Nevertheless, if a timing technique can improve reliability without changing the reward-to-risk ratio, it is worth studying. This article examines entry signals used in several well-known stock and futures systems. For each system, we will describe the entry logic, the market conditions it assumes, the way it is calculated, and the situations where it may fail or be misused. The systems covered include William O'Neil's CAN SLIM stock selection method, Warren Buffett's company evaluation model, Perry Kaufman's adaptive trading approach, William Gallacher's fundamental analysis method, and Ken Roberts' 1-2-3 reversal technique. The discussion is educational and focuses on mechanics rather than on providing trading recommendations. By comparing these approaches, we can see how entry signals are built on different assumptions about market behavior and how their effectiveness depends on the broader system design. Understanding these differences can help traders appreciate why no single entry technique works in all conditions and why entry should not be viewed in isolation.
William O'Neil's CAN SLIM Entry Technique
William O'Neil's CAN SLIM system is a well-known stock market trading approach. Within this system, entry is the timing component, and it is based on various chart patterns that can be found in the stock being considered. According to the study notes, the key part of entry is a price breakout after a consolidation lasting from 7 weeks to 15 months. Typical patterns include the cup with handle, long base breakout, saucer with handle, and double bottom or double base. The first two patterns are the most common. O'Neil provides many examples of these patterns in his book. Another critical element is that the breakout must be accompanied by a large increase in volume. For example, O'Neil suggests that volume at the breakout point must be at least 50% greater than the stock's average daily volume. This volume surge is the most important aspect of O'Neil's entry system, yet it is rarely followed by traders. Most people simply look for a pattern like a cup or handle, or they just look for a price breakout. The study notes use an analogy: think of volume as the quality of a vehicle. If a heavy truck starts moving fast, it is more likely to continue than a small car that turns or stops when it hits a coin. In other words, high volume indicates strong institutional participation and conviction behind the breakout. Without volume, a breakout may be more likely to fail. Common misuses include ignoring volume, trading breakouts without confirming the overall market direction, and applying the system to markets other than stocks. Failure scenarios include false breakouts, especially in weak market conditions, and breakouts that lack volume confirmation. The system is designed for stock selection and timing, not for futures or foreign exchange.
