Aqui fica a segunda parte do artigo.
"Quell the Confusion Over Stop-Losses, Part 2"
By Alan Farley
Special to RealMoney.com
03/20/2003 12:06 PM EST
"On Tuesday, my column offered traders helpful solutions to their common problems with setting up stop-losses. Today I'm following up with more questions and answers on this important subject.
We can spend hours deciding whether a stock is a good buy or a good sell, but this emphasis is often misplaced. Over time, carefully chosen exits are more important than great entries. You don't believe me? Just ask all those folks who bought tech stocks in the late 1990s.
Question: A stock breaks out and moves in my favor, but my stop gets hit most of the time on a pullback. How can I avoid this?
Answer: This scenario illustrates the major problem traders face when they chase breakouts. For example, you get a breakout and a strong move in your favor. You're taught to protect profits, so you place a stop-loss that guards some of the gains in anticipation of making more money when the stock runs. But the nature of price mechanics suggests that after an initial rally, a stock will pull back to test the original breakout level.
Both of your stop-loss choices have problems. First you protect profits with a trailing stop, but you risk getting hit when price pulls back to the breakout level. Second, you place the stop under the breakout level, but then you turn a winner into a loser. This also adds risk, because pullbacks often overshoot support-resistance just to get to the stops that are buried there.
The pullback from a rally is a two-edged sword, because it's a buy signal and a stop-loss level at the same time. In other words, if I'm already positioned I feel the need to sell, but if I'm not positioned, I feel the need to buy. The solution is counterintuitive and simple. Train yourself to avoid breakout entries and instead trade pullback entries.
Q: Should I lift my stop-loss when I know the stock will gap against my position when it opens?
A: I usually lift the stop-loss, but every case is different. Watch the pre- and postmarket trading, and see how much pressure the stock faces and whether it's trading above or below major support-resistance. The ability to hold higher price levels predicts that the stock will stabilize when the market opens. Keep in mind that New York Stock Exchange stocks may give few clues in extended hours.
When there's news that could affect the stock, I pull the stop loss and keep the position through the open. Then I try to hold for the first 10 to 15 minutes to see if it reverses or runs. If the stock starts to run or breaks a large support-resistance level, I get out immediately. The strategy can lead to a larger loss, but it's a tradeoff, because the gap prints the high or low for the day more than 70% of the time.
Q: Do market insiders see our stop-loss orders and purposely try to trigger them?
A: Some brokers hold stops locally, while others send them out to the "floor." But it doesn't really matter whether insiders see them or not because they know where you'll place them, even if they're not physical. Millions of traders came before you and applied the same logic to stop placement that you do every day. So unless you find a more creative way to accomplish this task, you'll wind up selling at the worst possible price anyway.
Q: Once a trade turns profitable, when do I adjust the stop loss to ensure I won't take a loss? And thereafter, if the trade continues in my favor, what rule do I use for trailing stops?
A: I figure an amount of initial wiggle room based on my goals for the trade. If the reward target is several points away, the stock needs to move around a lot, and I don't want to get in its way. If it's a small trade, I don't want to lose a penny after I get the first thrust away from my entry price.
The best strategy as the trade evolves is to use support-resistance on the 60-minute chart to move your trailing stop. For example, you get your rally and the stock congests for a few bars. When price breaks even higher, move your stop behind the last congestion pattern. This way, price needs to break the smaller support before it hits your trailing stop.
Get more aggressive as the stock approaches your reward target. Shift your strategy after the price passes 75% of the distance between your entry and intended exit. At that point, there's no sense risking a bundle in order to make a few pennies. Move the stop in close so any small reversal takes you out of the trade.
Q: How can we trade profitably with stop-gunning games going on all the time?
A: Stop-running or stop-gunning (both terms are used) occurs when a price is pushed through support or resistance in order to trigger the stops that are hiding there. After the stop supply is exhausted, the market bounces back in the other direction, usually winding up where it was before the exercise began.
You only have two choices if you're positioned before a stop-gunning exercise. First, keep the stop-loss outside commonly targeted price levels. This is tough to do because it adds a lot of risk to the trade. Second, keep the stop loss in very close and take another position after the stop-gunning is over.
Look to step into stop-gunning games from the sidelines rather than being a sitting duck with a position bought or sold at a dangerous level. You can often get dramatic fills with good timing during these games.
Q: Why do I always place my stop loss at an exact high or low?
A: You're describing a condition known as trader's disease. It's caused by the market tendency to gravitate toward the price that causes the most pain. Options traders are especially vulnerable to this affliction. It's not really sinister, it's just the nature of the market.
Start by realizing that volatile stocks can't be traded with tight and scientific stops, because all their support-resistance levels are channeled. This pushes a stock back and forth through common stop levels but keeps the ongoing trend intact. If you get up close to a price chart, you'll notice there's large bar-to-bar overlap most of the time. This makes it hard to get your move without getting shaken out.
Q: How can I keep my stop loss from getting hit all the time on Nasdaq tech stocks?
A: Keep your size down when trading volatile stocks. Before you trade, ask yourself how far that stock can move in its natural wiggle. This quick analysis takes a long time to master and is complicated by the tendency of market volatility to change from day to day. You can also avoid getting your stops hit by picking lower-beta stocks to trade. This means avoiding most four-letter stocks.
Q: When should I use a stop-limit order?
A: I never use a stop limit on anything. It's too easy for the stock to go right through your price, not get filled, and trigger a deeper loss. When you want out, you want out. When you need to get out, you need to get out.
A regular stop-loss order becomes a market order when price trades through it. This gives you more control than a stop-limit order, as long as you choose your stock wisely. Keep in mind the more volatile the stock, the wider the potential loss will be on this type of order. When possible, pick lower-volatility stocks that will hit your stop and trigger at that price, without slippage. "
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