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Strategies & Market Trends : Systems, Strategies and Resources for Trading Futures -- Ignore unavailable to you. Want to Upgrade?


To: GROUND ZERO™ who wrote (27931)7/16/1999 5:32:00 PM
From: SE  Read Replies (1) | Respond to of 44573
 
Found this in an email from the trader's club forum. I hope they don't mind my reprinting it here.

-scott
-------------------------
First in a Series of Articles About Exits

Part one: Importance of Exits

The outcome of every trade is dependent on the exit. If we
enter in a timely fashion and then exit poorly, the trade is
likely to be a loss. If our entry happens to be poor but
our exit is good we might still salvage a profit. The
exits, not the entries, determine the outcome of our trades.
This lesson about exits is easily demonstrated. Take any
entry strategy and begin combining it with different exit
strategies. You will quickly see that we can change the
results dramatically by making only minor adjustments to the
exits. In fact it becomes nearly impossible to tell if an
entry is any good because the results are so exit dependent.
Bad exits can make a good entry look bad and good exits can
make a bad entry look good.

When testing the validity of an entry method it is best to
begin by simply exiting the trades after a number of bars.
If you do anything more creative than this simple exit you
will find that you are really testing your exits, not your
entries. If you change the exits while attempting to test
an entry strategy the results will vary so much depending on
the exits selected that you will find that you can not make
any valid assumptions about the reliability of the entry.
When combined with the right exit the entry strategy looks
great. When combined with the wrong exit the same entry
looks terrible.

The purpose of an entry is to get the trade started in the
right direction. To test the effectiveness of an entry we
simply measure what percentage of the time it gets our trade
started in the right direction. For example if we have
entry "A" that has 60% winning trades after five days it is
better than an entry "B" that has only 45% winners after
five days.

You will notice that we made no comparison of risk or
profitability in picking the best entry. What if entry "A"
lost money and entry "B" made money? Is entry "A" still
better? The answer is "Yes" because the purpose of an entry
is merely to get the trade started in the right direction.
After that everything else is dependent on the exits.
Entry "B" just happened to make more money because of the
particular exit we selected for the test. We can easily
adjust our exits and we will find that entry "A" will
consistently make more money than entry "B" because it gets
the trades started in the right direction more often. To
maximize our profit we need to combine the right entry with
the right exit.

In our book, Computer Analysis of the Futures Market, we
tell an amusing anecdote about a trader who seemed a bit
loony because he used a Coke bottle with a broken radio
antennae sticking out of it to receive trading advice from
other planets. This advice, like most trading advice, was
only related to the entries. When the voice from the Coke
bottle told him to enter a trade he would come back to my
desk and want to put the trade on right away saying
something like: "They are buying soy beans on Mars, buy some
beans for me".

The other traders sitting around the board room would
overhear these frantic orders and became quite interested in
this strange trading advice. Naturally they were quick to
make fun of the trader when he was losing but they didn't
have much to say when he was winning. The trader with the
Coke bottle eventually learned that to avoid ridicule he had
to take his losses quickly and hold on to his winners as
long as possible. His trading steadily improved and he
wound up being a surprisingly good trader. Obviously, his
reliance on trading advice from other planets had nothing to
do with his success. His entries were no better or worse
than random but he had learned to be very good at his exits.

We should do the same.

Note: If you haven't read it recently, now would be a good
time to review Bulletin #22 which deals with the issue of
"control". Controlling exits is much more difficult than
entries.

Go here:
traderclub.com

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