Trading the Streak: Connors' Multiple Days Up and Down Strategy

One of the core tenets of Larry Connors' trading philosophy is that markets have memory. The price action of the recent past can provide valuable clues about the probable direction of the near future. This concept is at the heart of his Multiple Days Up and Multiple Days Down (MDU/MDD) strategy, a simple yet effective model for identifying high-probability mean-reversion setups.

The Psychology of Streaks

The MDU/MDD strategy is based on the observation that a stock that has moved in the same direction for several consecutive days is likely to be overextended and due for a correction. A multi-day winning streak can lead to euphoria and overconfidence, while a losing streak can create a climate of fear and panic. In both cases, the market has likely overshot its fair value, creating an opportunity for a savvy trader to step in and profit from the inevitable snapback.

The Mechanics of the MDU/MDD Strategy

The MDU/MDD strategy is a versatile model that can be adapted to a variety of market conditions and timeframes. Here is a breakdown of the core components:

Entry Rules (for a long trade):

1. Long-Term Trend Filter: The stock must be trading above its 200-day simple moving average (SMA).
2. Losing Streak: The stock must have closed down for a specific number of consecutive days (e.g., 3, 4, or 5). The optimal number of days will vary depending on the market and the instrument being traded.

Exit Rules (for a long trade):

1. Winning Streak: The position is exited when the stock closes up for a specific number of consecutive days (e.g., 1 or 2).

Risk Control and Money Management:

As with many of Connors' strategies, the MDU/MDD model does not rely on a traditional stop-loss. The risk is managed by the high probability of the setup and the expectation of a quick reversal. However, traders should always be mindful of their risk tolerance and may choose to implement a catastrophic stop-loss to protect against unforeseen events.

Backtesting and Performance

The MDU/MDD strategy has been shown to be a consistently profitable model across a wide range of markets and timeframes. The key to its success is its ability to identify moments of extreme sentiment, which are often followed by a sharp and predictable reversal.

Backtesting has shown that the optimal number of down days for entry and up days for exit will vary depending on the volatility of the instrument being traded. For example, a more volatile stock may require a longer losing streak to signal a valid entry, while a less volatile stock may be ready to reverse after just a few down days.

The MDU/MDD in Practice

Let's say we are trading a stock that is in a strong uptrend. The stock then experiences a three-day losing streak, with each day closing lower than the previous day. This triggers a buy signal. We enter a long position at the close of the third day. The next day, the stock reverses course and closes higher. We exit the position at the close, capturing a quick and easy profit.

Conclusion

The Multiple Days Up and Multiple Days Down strategy is a simple, yet effective, model for trading mean reversion. By identifying and exploiting the psychology of streaks, traders can gain a significant edge in the market. As with any trading strategy, proper backtesting and risk management are essential for long-term success. But for those who are willing to do the work, the MDU/MDD strategy can be a valuable addition to their trading arsenal.