[R-SIG-Finance] QuantMod trading models docs?

[Jeff Ryan]

>   Thanks. Can I just install that over the top of the currently
> installed CRAN version? If so I'll give it a try today. If not then am
> I required to so a remove.packages first?
>

Should just be able to install over.  You will have to wait for the
updates on R-forge to get built, or you could always install from
source (the svn tree).

>   To keep the email list smaller thanks for the pointer over the
> weekend to the previous conversation on this topic. It's clear folks
> have given this a great deal of thought and there are a number of
> tools out there that address at least portions of the problem. that
> should make for many hours of investigation on my part.

Usually does make things faster.
>
>   Maybe it's just a terminology thing but I'm surprised that
> backtesting - to me simply executing the model on a given data set and
> collecting the results - should be considered so difficult. I would
> have thought that would be relatively straight forward and maybe
> optimization would be the real problem.
>
>   In terms of and code I'd certainly be happy to share non-system
> specific portions but please don't hold your breath. I'm not a
> programmer so all of this stuff is a struggle and results come very
> slowly. That said my original thought on this would have turned some
> of what I see in blotter into something that looks a bit more like
> EasyLanguage on TradeStation, but that's just so I can go back and
> forth between R and TS. EL really only has 4 commands for buy/sell
> operations:
>
> Buy
> Sell
> SellShort
> BuyToCover
>
> and then adds the modifiers "market", "stop" o r limit" to specify the
> way the order executes against price. I was going to focus on creating
> some code to do that and see where it led me.
>
>   I am a bit concerned reading through your thread that possibly I'm
> going to have real trouble with tick data in R? I'm not working on
> end-of-day stuff as I'm a day trader and am flat every night. (Deity
> willing) My tick data is has date and time but isn't guaranteed unique
> in that respect. Is there any reason you or others know of why xts or
> zoo should not handle tick data?
>
Tick data should be no problem for xts or zoo.  Many people use it for
that with good success.  Uniqueness is an issue outside of the time
representation.  You can always do something to make the timestamp
unique.  The question is whether or not you should treat it as unique.
 Depends on what you are doing really.

Others on this list are very active in the high-freq space, so one or
more may provide some detailed comments.

>   Clearly I have a lot to study and since turtles now runs I can do that.

Keep us posted (on or off list).

Thanks,
Jeff

>
> Cheers,
> Mark
>
> 2009/10/12 Jeff Ryan <jeff.a.ryan at gmail.com>:
>> One comment on blotter and speed.
>>
>> The most recent CRAN version of xts doesn't handle repeated subsetting
>> by time-class objects very efficiently.
>>
>> This is the primary cause of pain in the blotter you are trying (likely).
>>
>> The recent R-forge version of xts has had this corrected, and should
>> represent something close to 60x better performance.
>>
>> HTH,
>> Jeff
>>
>> 2009/10/12 Mark Knecht <markknecht at gmail.com>:
>>> Hi Daniel,
>>>   Thanks for your help. this morning I see that the Blotter package
>>> was once again available for download using the command below so I'm
>>> able to load it and run the turtles demo. (VERY slowly by the way!)
>>>
>>>   Anyway, this is extremely helpful and fives me something to study
>>> to see if what I'd like to do is possible in R.
>>>
>>> Cheers,
>>> Mark
>>>
>>> 2009/10/11 Daniel Cegiełka <daniel.cegielka at gmail.com>:
>>>> You can download and install this manually:
>>>> http://r-forge.r-project.org/src/contrib/blotter_0.3.tar.gz
>>>> unpack this and save as a zip file (if you have windows).
>>>> copy this in to your R-work folder and:
>>>> install.packages("blotter_0.3.zip",repos=NULL)
>>>> best
>>>> daniel
>>>>
>>>> W dniu 11 października 2009 16:42 użytkownik Mark Knecht
>>>> <markknecht at gmail.com> napisał:
>>>>>
>>>>> Yes, that's the command on the blotter page, but it seems that the
>>>>> files have gone missing or something...
>>>>>
>>>>> > install.packages("blotter",repos="http://R-Forge.R-project.org")
>>>>> Warning: unable to access index for repository
>>>>> http://R-Forge.R-project.org/bin/windows/contrib/2.9
>>>>> Warning message:
>>>>> In getDependencies(pkgs, dependencies, available, lib) :
>>>>>  package 'blotter' is not available
>>>>> >
>>>>>
>>>>> As I said earlier, if I go to the download link and try to download
>>>>> the Windows zip version it says there's nothing there. Same as this
>>>>> command is saying.
>>>>>
>>>>> I'll try again later. Maybe it's just having problems right now.
>>>>>
>>>>> Thanks,
>>>>> Mark
>>>>>
>>>>> 2009/10/11 Daniel Cegiełka <daniel.cegielka at gmail.com>:
>>>>> > install.packages("blotter",repos="http://R-Forge.R-project.org")
>>>>> >
>>>>> > regards
>>>>> > daniel
>>>>> >
>>>>
>>>>
>>>
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>>
>>
>>
>> --
>> Jeffrey Ryan
>> jeffrey.ryan at insightalgo.com
>>
>> ia: insight algorithmics
>> www.insightalgo.com
>>
>



-- 
Jeffrey Ryan
jeffrey.ryan at insightalgo.com

ia: insight algorithmics
www.insightalgo.com