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Author: mark19601962 Big red star, 1000 posts Add to my Favorite Fools Ignore this person (you won't see their posts anymore) Number: of 251965  
Subject: gtr1 Date: 2/10/2013 12:04 PM
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Is there a tutorial to learn this, or do you have to play around with it?

If I have to play around with it, I think I will stick with Jamie Gritton's Backtester, and keelix.

Mark
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Author: mungofitch Big gold star, 5000 posts Top Favorite Fools Top Recommended Fools Feste Award Winner! Old School Fool Add to my Favorite Fools Ignore this person (you won't see their posts anymore) Number: 241525 of 251965
Subject: Re: gtr1 Date: 2/10/2013 12:52 PM
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If I have to play around with it, I think I will stick with Jamie Gritton's Backtester, and keelix.

It's not so much that you have to play around with it to find out what it does,
more that it's complex so you have to try things like doing homework to learn things better.
The documentation from Robbie is a bit scattered about, but it's quite rigorous.
(as with pretty much anything Robbie does)

Just search for posts mentioning gtr1 with author rgearyiii, sort descending by recs.

The best way to learn it is to go through the example screens
and compare the backtest.org or radiscript definitions to the corresponding gtr1 code.
The first few examples were done one post at a time by Robbie, and
they walk through the reasoning. Search for his posts containing the word "torpedo" .
Start with simple screens (RS26, then maybe YLDYEAR), work your way up.
Use High_Relavive_Value as your PhD thesis. The "rank" commands are the hardest to grasp.
http://boards.fool.com/highrelativevalue-not-torpedoed-25735...

The main starting points are
the examples http://members.iinet.net.au/~rgeary/example.html
The (incomplete but handy) field summary http://members.iinet.net.au/~rgeary/fields.html
The (almost entirely) complete glossary http://members.iinet.net.au/~rgeary/glossary.html
and the always-up-to-date-but-cryptic list:*.* parameter

Jim

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Author: mark19601962 Big red star, 1000 posts Add to my Favorite Fools Ignore this person (you won't see their posts anymore) Number: 241528 of 251965
Subject: Re: gtr1 Date: 2/10/2013 1:46 PM
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Thanks a lot. I gather it is by far the best backtester, provided you can learn how to use it.

Thanks again.

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Author: lsmr409 Big red star, 1000 posts Old School Fool Add to my Favorite Fools Ignore this person (you won't see their posts anymore) Number: 241537 of 251965
Subject: Re: gtr1 Date: 2/11/2013 3:40 AM
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Jim,

One thing that does add an extra hurdle with testing SIPro screens in particular is that with each new update to the backtester, the way to enter fields keeps changing.

I had figured out, more or less, how to run some of my favorite SIPro screens in the 2009 GTR1 version. But now, they don't work anymore in the 2011 version.

In the links you gave to the examples and the field summary, they are only accurate for testing thru 2007, I believe.

Is there anywhere a nice compendium mapping the correct *current* field entries to their equivalents back in 2008 when Robbie gave the examples and field summary? This would be truly helpful!

Todd

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