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Dave:
Why not try a simple Nbar exit, like:
nBar=Optimize("nbar",6,1,15,1); ApplyStop( stopTypeNBar,
stopModeBars, nbar);
I don't know what your average trade duration is, but whatever it is, you
can set Nbar to get you out at some time point near your average trade length
(or min or max or whatever) if the stock does not move. This plus the
combination of a max stoploss to get you out if the stock moves against you and
a trailing stop to get you out with a profit or a profit target stop might get
you what you want.
Al Venosa
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Dave Merrill
To: <A title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Friday, December 12, 2003 5:39
PM
Subject: RE: [amibroker] exiting flat
positions
<SPAN
class=711043222-12122003>Hi Gary, I saw your EI post and want to investigate,
but unless I'm misunderstanding something, that's not the issue I'm trying to
get at. It seems like you'd use EI to put you in stocks that move
without big changes in volatility, which I'd think would allow more tailored
stops, among other things.
<SPAN
class=711043222-12122003>
<SPAN
class=711043222-12122003>What I'm wondering about is positions that don't move
at all, or stop moving after you've held them a while. For instance, say you
get a great bump up immediately after entry, then it just sits there flat.
Doesn't hit a stop since it's not falling, didn't go high enough to hit a
target if you have one, just sits.
<SPAN
class=711043222-12122003>
<SPAN
class=711043222-12122003>My code was an effort at kicking positions like that
out the door at some point, so their capital can be used for other things. It
didn't test out profitably in the context I checked it though. Not sure what
that means.
<SPAN
class=711043222-12122003>
<SPAN
class=711043222-12122003>Dave
<SPAN
class=711043222-12122003>
<BLOCKQUOTE dir=ltr
>
I like your code, and your idea. In terms of an alternative, Al
posted Tharpe's Efficiency Index which addresses chop. Here's his code
and explaination. Regards,
Gary
Effiency Index (EI) = (C - ref(C,-x)/ATR(x)
An efficient stock is a stock whose price movements are high
relative to its volatility changes (i.e., the price change is high but the
volatility change is minor). So, if a stock increases by 3 points while its
volatility only increases a little, that's good because it gives you greater
profitability at a given volatility.
I think the way you would use it would be as a boolean Buy (or
Short) qualifier. In other words, something like this:
Buy = <your normal buy rules> AND EI > y; //where y
is an optimizable variable.Dave Merrill
<dmerrill@xxxxxxx> wrote:
<BLOCKQUOTE class=replbq
>Obviously,
losses are a problem. But so are positions that hang in thereforever
taking up available cash but going nowhere, without hitting
profittargets or stops.How would you code that, assuming
you're dealing with a system that tries todump losers but let winners
run as long as they're advancing.I tried starting from a modest
stoploss, with the stop percentage advancingevery day until it becomes
negative, enforcing the requirement to make aprofit or get off the
bus. I'm not certain, but I think it's working, justnot very
profitable in the context I tried it:.Here's the
code:----------------bars_since_buy = NZ(BarsSince(buy),
BarCount);bars_since_short = NZ(BarsSince(short),
BarCount);bars_since_entry = IIf(bars_since_buy < bars_since_short,
bars_since_buy,bars_since_short);stoploss_rise =
Optimize("stoploss rise", .5, .1, 1, .1);stoploss = 13 -
(stoploss_rise * bars_since_entry);ApplyStop(stopTypeLoss,
stopModePercent, stoploss, false, true,
0);----------------Anyone see any problems with the
implementation? Any other ideas foravoiding sitting in stagnant
positions?DaveSend BUG REPORTS to
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