Stop losses - an important part of stockmarket trading

If there is one area guaranteed to confuse manytrade is triggered at the first price available in the
traders and lead to multiple opinions on the mostmarket for that size, which is why stops are not
appropriate approach, it is the subject of stop losses.guaranteed.
The science and the art of placing stops is featuredAs to the percentage size of the stop to be chosen,
extensively in many trading books and guides, but thethat depends on several factors including the trader's
bottom line is that there is no right or wrong answer,overall money management rules, amount of leverage,
simply the fact that stop losses must be used to limittime frame and crucially the underlying volatility of the
potential downside exposure when trading. Tradersshare chosen, which is very important.
should also be careful not to confuse stop losses withVolatility stops and the ATR
buy stops, which trigger an opening position rather thanClearly, a percentage based stop is likely to be
closing the trade.triggered more quickly in a highly volatile share and one
It is very important not to package together the placingof the ways traders can adjust stop levels is by ratio
of stops with money management, as the twoto the underlying volatility. There are various measures
represent different strands of trading. Simply put, stopsof volatility available, but a simple way is to use a stop
are there to protect profits and limit the potentialrelated to a multiple of the average true range
downside at any time once a trade has been opened,indicator, which is featured in most software packages.
and are part of an exit strategy for trades that areThe ATR determines a share's volatility over a set
already open. Money management covers positionperiod that can be defaulted as desired. The daily
sizing or amounts to be risked within each trade of aATR indicator is very simple to calculate and is the
portfolio.highest of:
Within this potentially complex subject, there are manyThe difference between the current high and the
different types of stops, and it should be added thatcurrent low
stops are never guaranteed unless that facility isThe difference between the current high and the
offered by the broker for an additional charge.previous close
Nevertheless, their use is an essential part of anyThe difference between the current low and the
trading strategy. For the examples below share pricesprevious close
are used, but stop losses should also be used whenBasically this is the maximum range in which the share
trading CFDs in commodities, forex or indices.has traded from the previous close to the current high
The uses and abuses of stopsand low. The average is then taken over a set number
Much has been written about the placing of stops andof days (ten is often used), and the stop is then
how to avoid them being triggered without too muchcalculated as a multiple of the ATR.
risk. This of course is the $64m question for mostThe reason this indicator is useful is that it becomes
CFD traders and very often causes moreeasier to place a stop outside the normal range of
consternation than any other aspect of the tradingtrading so that it is not hit by the short term random
process.action of individual shares based on their average
The basic idea behind where to place a stop is byvolatility.
reference to the overall trend or trading range withinAs to the multiple of the ATR to be used, that is for
which the share is moving. As to the actual level of thethe trader to decide, but longer term players and
stop, it depends on several factors including theseasoned stockmarket investors tend to find a 2.7 to
trader's overall money management rules, the amount3.3 multiple (which can equate to 5% to 15% stop
of leverage, the time frame, and crucially the underlyinglosses) is applicable. Shorter term or highly leveraged
volatility of the share chosen. The stop should aim toplayers need to tighten the stop accordingly by
be placed at a level which if triggered would confirmadjusting this multiple.
the trade was incorrect.The breakeven stop
There is no point in trading a highly leveraged CFDThis is a commonly used stop in which the trader
account with routine 5% stops as eight losses in acloses the position if it reaches a minimum profit and
row, which statistically can be expected every fewthen returns to even or back to a loss. So in the
hundred trades, would lead to a minimum 40%above example, if the price of BT rises say 2% to
drawdown on the account.336p, the stop is moved up to 330p, which was the
Having said that, there is equally no point in attemptingopening price of the trade.
to reduce the risk too far by setting 1.5% or 2% stopsPlease note that the breakeven stop here is not simply
in highly volatile stocks or takeover situations as eacha new 2% stop loss - it's very slightly different - but
trade needs room to breathe, and stops this tight arevery often this approach is used as a rough and ready
likely to be triggered within the normal daily ebb andway to protect the downside. This leads on to the
flow of price movements.important subject of trailing stops.
A good rule of thumb is that if you cannot see at leastTrailing stops
double the potential profit in a trade compared toTrailing stops are widely used by professional traders
where you expect to place your stop loss, that tradeas they provide an element of protection for winning
should be passed over. Indeed some CFD traders lookpositions without sacrificing too much of the profit.
for three times profits achieved against losses as aThe idea here is that once the position is opened, the
starting ratio. Consequently an approach like this cantrailing stop runs behind of the best profit achieved
be very successful by winning just three or four timesthroughout the trade and the stop (whether
out of ten, and is the hallmark of many of the world'spercentage or price) is moved up accordingly.
leading traders.There are three rules and suggestions (examples here
Many losing traders look for an entry point or strategyare for long positions):
that wins six or seven times out of ten, but this is very1 The stop can and must never be lowered
hard to achieve consistently. Although the feeling of2 The percentage or price of the stop at each stage
winning regularly is certainly warm, the win/loss ratioof the trade does not have to be the same. For
here very often tends to be very poor as too manyexample, the trader in the above example may begin
winners are taken quickly, so the correct use of initialwith a 2% stop in BT, and then the share price might
and running stops placement is crucial.rise to 346.5p, which represents a 5% profit. At that
Types of stops:point, the trader may wish to tighten the stop to 1%, so
The basic maximum loss stopthat a minimum 4% profit can be taken but with more
The maximum loss stop is the starting point for mostpotential upside. This approach is to the discretion of
traders and is triggered when the share price hits aeach player, but it is a very useful way of nailing down
level below or above the opening price of the trade,profits.
depending on whether it is a long or short position. It3 Another approach is to raise the stop loss with
can be measured in percentage points or actualreference to recent action after a certain profit has
money terms, but for these examples percentagesbeen reached. Instead of a percentage stop, the
are used. So if a CFD trader buys shares in Britishtrader might move the stop up behind daily lows, thus
Telecom at 330p with a 2% stop loss, then theprotecting against a potential trend change.
allowed loss is 6.6p and the position is closed if the bid4 The stop might be triggered if there is a sudden rise
or selling price falls to 323.4p or lower.in volatility with a reversal in the shares, and some
Note that no mention is made of how many sharestraders use as a trigger if the day's ATR is double the
are purchased or how much is being risked, as this isaverage ATR of the last ten days. This is very useful
part of the client's overall money management.where a wider initial stop has been taken and there is
If the shares gap down below the stop either intra-daythe potential for a trend change before the trailing stop
or at the open of trading the next day, the closingis hit, thus protecting the downside.