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Hi William,
Yes, since all the real work is done in the DLL, it would have to be
modified. I would need to add code to calculate your StochRSI for each
optimization step and then test them all to find the best one. But, the DLL
was written before TJ added looping ability to AFL - you can now do this
yourself for your own indicators right in AFL. I have pasted an example by
TJ below showing how to do this, and I added the plot statements to show how
you can plot the results.
Steve
---------------------------------------------
Yes it is possible to perform optimization using for loop inside exploration
code:
Sample code follows, it runs optimization inside for loop and reports only
THE BEST
result. It should be run usign "EXPLORE". The code in fact runs several
backtests inside 'for' loop and notes the best result and best parameter
range.
bestequity = 0;
bestrange = 0;
// optimization loop
for( range = 12; range < 40; range ++ )
{
Buy = Cross( Close, EMA( Close, range ) );
Sell = Cross( EMA( Close, range ), Close );
Le = LastValue( Equity() );
if( Le > bestequity )
{
bestequity = Le;
bestrange = range;
}
}
range = bestrange;
Buy = Cross( Close, EMA( Close, range ) );
Sell = Cross( EMA( Close, range ), Close );
Filter = BarIndex() == BarCount - 1;
AddColumn( bestrange, "Best range" );
AddColumn( Equity(), "Best Equity" );
Plot( Equity(), "equity", colorRed, styleLine);
Plot( EMA( Close, range ), "Opt EMA", colorBlue,
styleLine|styleLeftAxisScale);
Plot( Close, "close", colorBrightGreen, styleLine|styleLeftAxisScale);
----- Original Message -----
From: "willem1940" <w.j.a.struyck@xxxxxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Sunday, June 15, 2003 3:22 PM
Subject: [amibroker] Re: overhaul to AutoOpttools
> You just post an impressive amount of work and someone wants more.
> Ths time it is me. I would like to try the tool on intraday futures.
> In principle this should work but the results sofar are not very
> impressive; will have to d some more work on proper settings.
> However I would like to try the tool on the custom system (based on
> StochRSI) I use for my future trade. Is it possible to modify the
> tool in order to work with custom buy and short signals or does this
> require work in the *.dll file (something I have no knowledge of).
>
> Willem Jan
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Steve Dugas" <sjdugas@xxxx> wrote:
> > That is great Herman, maybe you will discover and teach me a few
> things about them! I will look forward to hearing anything you may
> care to post. Thanks for your interest!
> >
> > Steve
> > ----- Original Message -----
> > From: Herman van den Bergen
> > To: amibroker@xxxxxxxxxxxxxxx
> > Sent: Sunday, June 15, 2003 4:02 AM
> > Subject: RE: [amibroker] overhaul to AutoOpttools
> >
> >
> > Thank you steve, btw; you don't babble at all, your concept is
> quite interesting! I am probably one of those "system guys" who want
> to OOS and look at historical performance. Also; I am more an
> experimental coder than a trader...
> >
> > I'll have to do some experimenting with your indicators, this
> will take some time :-) thank you again for introducing an
> interesting concept.
> >
> > herman
> >
> > -----Original Message-----
> > From: Steve Dugas [mailto:sjdugas@x...]
> > Sent: Saturday, June 14, 2003 8:47 PM
> > To: amibroker@xxxxxxxxxxxxxxx
> > Subject: Re: [amibroker] overhaul to AutoOpttools
> >
> >
> > Hi Herman,
> >
> > Thank you for the kind words : - )
> >
> > Actually, these weren't really designed for out-of-sample
> testing, but I think you could do it with a little extra work. I
> suppose a little background is probably in order - At the present
> time I am a discretionary trader, and I concentrate on what is
> happening now - I really dont even check to see how these indicators
> would have performed in the past. Since they are optimized over the
> time period you select, I assume they would have their ups and downs
> when the same values are used for other time periods. I have only
> been doing TA for about 2 or 3 years now, and when I started, I spent
> the first year or so backtesting, using and trying to combine all the
> popular indicators, but was generally disappointed with the results -
> I'm sure you know the story - works on some stocks but not others,
> take a closer look at the good ones and find out the same system
> would have failed miserably the year before, big drawdowns vs.
> mediocre returns, stock's personality suddenly changes, etc... I
> never did find a system I really liked, so rather than continue down
> that road, I decided to try a different approach - concentrate on
> what each individual stock is doing now, and try to be as "tuned in"
> as possible to any changes in behavior.
> >
> > So I came up with these self-optimizing indicators. I think the
> important thing to know about them is that they continually
> reoptimize themselves as new data is added, so you can see changes
> happening in real time. They do not just carry yesterday's optimized
> value forward (well, they can do that if you want, but I dont use
> them that way, and I probably wouldn't expect to see very good
> results). This daily reoptimization is actually a double-edged sword -
> it is good to stay on top of things, and know that you are seeing
> the latest, best result for each indicator and each stock, but on the
> other hand it is possible that they can change without warning (i.e. -
> today's 5 period MA can become tomorrow's 10 period MA) and you may
> suddenly find yourself on the wrong side of the trade. While it is
> theoretically possible for this to happen at any time I guess, in
> practice it does not actually seem to happen very often. But then
> again I have only been using them for a few months, and I also spend
> a lot of time running the included Explorer code to try and
> identify "friendly" stocks. I have actually been doing pretty well
> with them, but if you are a "system" guy who backtests your code
> against 5 or 10 years of data, you may not feel very comfortable with
> them. Of course, you could always select the entire data range as
> your test period, and automatically get the best parameters for each
> stock/indicator, but I really dont know offhand whether the return,
> drawdown etc would be any good or not.
> >
> > OK, I have babbled long enough, I will try to answer your
> question... : - )
> >
> > Yes, I think you could use these with AB's backtester to test
> on any range of data, but not without a little work. The code for
> each indicator calls the DLL, which sets AFL variables containing the
> optimal parameters for your test period. You can access these
> variables in AFL, and use AB's backtester to test any data range, but
> you would need to add the backtester code you want to use and plug in
> the parameter variables. For example:
> >
> > buy = cross( close, ma( close, OptParam1Val));
> >
> > You would also want to make sure the backtester Settings and
> the settings at the top of the AFL for the indicator you are testing
> are set to match as closely as possible. I actually thought about
> adding this code to all the indicators at one time, but decided not
> to bother until I was ready to use it...maybe I will add it soon.
> Meanwhile, if you decide to do this, I will be happy to help you in
> accessing the variables, etc, if you are having any trouble. Just
> let me know!
> >
> > Best Wishes,
> >
> > Steve
> > ----- Original Message -----
> > From: Herman van den Bergen
> > To: amibroker@xxxxxxxxxxxxxxx
> > Sent: Saturday, June 14, 2003 5:31 PM
> > Subject: RE: [amibroker] overhaul to AutoOpttools
> >
> >
> > Thank you Steve, some relly nice work!
> >
> > I have not used any of your auto opt tools before... could
> you explain how one would go about performing an out of simple test?
> Is that possible? Or are the signal always optimized?
> >
> > many thanks for a very interesting contribution!
> >
> > Herman.
> > -----Original Message-----
> > From: Steve Dugas [mailto:sjdugas@x...]
> > Sent: Saturday, June 14, 2003 3:32 PM
> > To: amibroker
> > Subject: [amibroker] overhaul to AutoOpttools
> >
> >
> > Hi All,
> >
> > I have made some changes to AutoOptTools, and posted the
> new version if anyone can use it. Picture attached. The main changes
> are:
> >
> > 1. Fixed a bug that caused the plotted indicators to
> disappear at times ( actually, they didnt disappear, just defaulted
> to the background color if certain conditions weren't met).
> >
> > 2. added volume histogram in the background.
> >
> > 3. added black triangles that automatically point to
> beginning and end of selected test period.
> >
> > 4. added color-sensitive up/down arrow to last bar to tell
> instantly if indicators are currently long or short. (usually wasnt
> hard to tell, but on occasion it could be)
> >
> > 5. moved some statistics and other info from the main
> screen and the title to the interpretation window.
> >
> > 6. added a couple of new statistics to the title.
> >
> > 7. now has 2 include files - for leading and lagging
> indicators (seems to give better results).
> >
> > 8. updated the help file - I left out a couple of things
> the 1st time.
> >
> > Best Wishes,
> >
> > Steve
> >
> >
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