Bulletin 34 Trailing Stops

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Bulletin #34
November 9, 1999

This is the Sixth Article in a Series of Articles About Exits

Trailing Stops

By Chuck LeBeau and Terence Tan

Now that we have taken the necessary precautions to avoid catastrophic losses by using disciplined money management stops, it is appropriate to concentrate on strategies that are designed to accumulate and retain profits in the market. When properly implemented these strategies are intended to accomplish two important goals in trade management: they should allow profits to run, while at the same time they should protect open trade profits.

While their application is extremely wide, we do not believe that trailing stops are appropriate in all trading circumstances. Most of the trailing exits we will describe are specifically designed to allow profits to run indefinitely. Therefore they are best used with trend following type systems. In counter-trend trading, more aggressive exits are more suitable. The “when you’ve got a profit, take it” philosophy works best when you are trading counter-trend, since the anticipated amount of profits is limited. However, to take quick profits in a trend is usually an exercise in frustration: we exit the market with a small profit only to watch the huge trend continue to move in our direction for days or months after our untimely exit. We therefore recommend using different exit strategies based on the underlying market condition. We will discuss the more aggressive exits later; for now we will concentrate on exits designed to accumulate large profits over time.

A thorough understanding of trailing stops is critical for trend-following traders. This is because trend following is typically associated with a lower percentage of profitable trades; which makes it particularly important to capture as much profit as possible when those large but infrequent trends occur. Typical trend followers make most of their profits by capturing only a few infrequent but very large trends, while managing to cut losses effectively during the more frequent sideways markets.

The rationale behind the use of the trailing stop is based on the anticipation of occasional extremely large trends and the possibilities of capturing substantial profits during these major trends. If the entry is timely and the market continues to trend in the direction of the trade, trailing stops are an excellent exit strategy that can enable us to capture a significant portion of that trend.

The trailing stops we will describe in this and following articles have similar characteristics that are important to understand as we use them to design our trading systems. Effective trailing stops can significantly increase the net profits gained in a trend-following system by allowing us to maximize and capture large profitable trades. The ratio of the average winning trade to the average losing trade is usually improved substantially by the use of trailing stops. However there are some negative characteristics of these stops. The number of profitable trades is sometimes reduced since these stops may allow modestly profitable trades to turn into losers. Also, occasional large retracements in open trade profits can make the use of these stops quite difficult psychologically. No trader enjoys seeing large profits reduced to small profits or watching profitable trades become unprofitable.
The Channel Exit

The simplest process for following a trend is to establish a stop that continuously moves in the direction of the trend using recent highest high or lowest low prices. For example, to follow prices in an uptrend, a stop may be placed at the lowest low of the last few bars; for a downtrend, the stop is placed at the highest high of the last few bars. The number of bars used to calculate the highest high or lowest low price depends on the room we wish to give the trade. The more bars back we use to set the stop, the more room we give the trade and consequently the larger the retracement of profits before the stop is triggered. Using a very recent high or low point enables us to take a quick exit on the trade.

This type of trailing stop is commonly referred to as a “Channel Exit”. The “channel” name comes from the appearance of a channel formed from using the highest high of X bars and the lowest low of X bars for short and long exits respectively. The name also derives from the popular entry strategy that uses these same points to enter trades on breakouts. Since we are focusing on exits and will be using only one boundary of the channel, the term “channel” may be a slight misnomer, but we will continue to refer to these trailing exits by their commonly used name.

For most of our examples we will assume that we are working with daily bars but we could be working with bars of any magnitude depending on the type of system we are designing. A channel exit is extremely versatile and can work equally well with weekly bars or five-minute bars. Also keep in mind that any examples referring to long trades can be equally applicable to short trades.

The implementation of a channel exit is very simple. Suppose we have decided to use a 20-day channel exit for a long trade. For each day in the trade, we would determine the lowest low price of the last 20 days and place our exit stop at that point. Many traders may place their stops a few points nearer or further than the actual low price depending on their preferences. As the prices move in the direction of the trade, the lowest price of the last twenty days continually moves up, thus “trailing” under the trade and serving to protect some of the profits accumulated. It is important to note that the channel stop moves only in the direction of the trade but never reverses direction. When prices fall back through the lowest low price of the last twenty days, the trade is exited using a sell stop order.

The first and obvious question to answer about channel exits is how many bars to use to pick the exit point. For example, should we set our stop at the lowest low of 5 days or the lowest low of 20 days, or some other number of days? The answer depends on the objectives of our system. A clearly stated set of objectives for the system is always very helpful at these important decision points. Do we want a long-term system with slow exits or do we want a short-term system with quicker exits? A longer channel length will usually allow more profits to accumulate over a long run if there are big trends. A shorter channel will usually capture more profits if there are smaller trends. In our research, we have found that long-term systems generally work well with a trailing exit at the lowest low or the highest high of the last 20 days or more. For intermediate term systems, use the lowest or highest price of between 5 to 20 days. For short-term systems, the lowest or highest price of between 1 to 5 days is usually optimal.

Trailing stops with a long-term channel accumulate the largest open profits if there is a sustained trend. However this method will also give back the largest amount of open profits when the stop is eventually triggered. Using a shorter channel can create a closer stop in order to preserve more open trade profits. As can be expected, the closer stop often does not allow profits to accumulate as nicely as the longer channel, and often causes us to be prematurely stopped out of a large trend. However, we have noticed that a very short channel length of between 1 to 3 bars is still highly effective in trailing a profitable trade in a runaway trend. The best type of channel exit to use in a runaway trend is a very short channel, for example 3 bars in length. We have observed that this exit in a strong trend often keeps us in a trade until we are close to the end of the trend.

It appears that there is a conflict of exit objectives here. A longer channel length will capture more profit but give back a large proportion of that profit; a shorter channel length will capture less profit, but protect more of what it has captured. How can we resolve this issue and create an exit that can both accumulate large profits, as well as protect these profits closely? A very effective exit technique calls for a long-term channel to be implemented at the beginning of the trade with the length of the channel gradually shortened as larger profits are accumulated. Once the trade is significantly profitable, or in a strongly trending move, the goal is to have a very short channel that gives back very little of the large open profit.

Here is an example of how this method might be implemented. At the beginning of a long trade, after setting our previously described money management stop to avoid any catastrophic losses, we will trail a stop at the lowest low of the last 20 days. This 20-day channel stop is usually far enough from the trade to avoid needless whipsaws and keep us in the trade long enough to begin accumulating some worthwhile profits. At some pre-determined level of profitability, which can be based on a multiple of the average true-range or some specific dollar amount of open profit, the channel length can be shortened to take us out of the trade at the lowest low of 10 days. If we are fortunate enough to reach another higher level of profitability, like 5 average true ranges of profit or some other large dollar amount, we can shorten the channel further so that we will exit at the lowest low of 5 days. At the highest level of profitability, perhaps a very rare occurrence, we might even be able to place our exit stop at the previous day’s low to protect the great profit we have accumulated. As you can see, this strategy allows plenty of room for profits to accumulate at the beginning of a trade and then tightens up the stops as profits are accumulated. The larger the profits, the tighter our exit stop. The more we have, the less we want to give back.

There is another way of improving the channel exit that is worthwhile to discuss: this is to contract (or expand) the traditional channels using the height of the channel, or some multiple of the average true range. How this might work is as follows: Supposing you are working with a 20-day channel exit. First you calculate the height of the channel, as measured by the distance between the highest 20-day high and the lowest 20-day low. Then you contract the channel by increasing the lowest low value and decreasing the highest high value previously obtained to determine the exit points. For instance, in a long trade, you could increase the lowest low price by 5% of the channel height or 5% of the average true range, and use that adjusted price as your exit stop. This creates a slightly tighter stop than the conventional channel. More importantly, it allows you to execute your trade before the multitude of stops that are already placed in the market at the 20-day low.

The last point can be considered an important disadvantage of the channel exit. The channel breakout methods are popular enough to cause a large number of entry and exit stops to be placed at previous lowest low and highest high prices. This can cause a significant amount of slippage when attempting to implement these techniques in your own trading. The method of adjusting the actual lowest low or highest high price by a percentage of the overall channel height or the average true range is one possible way to move your stops away from the stops placed by the general public and thereby achieve better executions on your exits.

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Webmasters Report

October was a busy month for us here at the Traders Club, with the release of the Strategic and Crossbow Systems and then the Piranha last week. There is plenty of new information on the Website. I am still getting all of the Combined Portfolio data updated to include the Piranha system, so that should be completed soon. We have also completed our transition to the new format of charts on our systems pages using Animations to show all the Trades on our Systems. Under each set of charts are links to a popup window if you want to study any particular year's trades. Other recent updates include a form for you to give us links submissions for our links page and a Recent Events Column on our home page.

If you haven't looked in to the forum http://traderclub.com/discus/index.html lately I encourage you make a visit there and check out the New Messages since your last visit.The forum has been very active lately with some very interesting discussions. Last but not least if you have not yet taken advantage of our free trial offer on our Signals Service we invite you to do so. http://www.traderclub.com/signals_freetrial.htm

Just a reminder that all during the month of November you can purchase all three of our S & P Systems, the Prudent, Remarkable and Piranha as a package for only $650.00, a discount of $100.00.

As always if you have any suggestions, or thoughts about how we can make our website more useful to you then please let me know.

If you know of anyone who you think might benefit from this Bulletin then please forward it to them and encourage them to join the Club.

David Elden

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Speaking engagements:

Chuck will be a featured speaker at this year's Technical Analysis Group (TAG) Conference at the MGM Grand Hotel in Las Vegas. Chuck's topic this year will be: "A New Look at Exit Strategies". Nov 19 - 22 1999

For information and details go here: http://www.traderclub.com/events.htm

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That's all for this time

Good Luck and Good Trading


Chuck Le Beau's System Traders Club
ph 310-265-9776
fax 310-265-9556