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[amibroker] Re: How to Calculate Probabilities and Statistics?



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--- In amibroker@xxxxxxxxxxxxxxx, "brian_z111" <brian_z111@xxx> wrote:
>
> --- In amibroker@xxxxxxxxxxxxxxx, "bilbo0211" <bilbod@> wrote:
> >
> > 
> > I will give some examples of what I would like to be able to do.
> > 
> > 1. http://www.topgunsoftware.com/ has some interesting trading 
> tools.
> > One thing it does is make statistical range projections (i,e., 
next
> > bar's high and low with confidence levels). I would like to do
> > something similar with Amibroker.
> > 
> 
> I have had a quick look at that site and yes, there are one or two 
> interesting things there e.g. the idea that buyers/sellers taking 
the 
> offer are agressive, cf passive traders who set a limit, and 
> therefore they are influencing the market in a way that allows 
> prediction is one of them. It's beyond the capabilities of most 
> traders to test that type of thing though - you have to be able to 
> acquire, manage and analyse vast amounts of data 'on the fly' 
(unless 
> you are willing to test their idea out with real money).
> 
> (Now that I have said that someone will probably jump up and say 
that 
> you can do it in AB).
> 
> I use a lot of basic stats in my work so I am interested in your 
> comments - I describe myself as a naive mathematician though.
> 
> Re statistical ranges with assigned probability levels (like a 
> probability cone?).
> 
> I think you need to be absolutely clear what it is you are asking 
for 
> before you can consider if it can be done e.g. they talk about 
> something called "statistical range projections" and somewhere else 
> the "average bar range and vol" (they don't say how many bars the 
> average is calculated over) - are they related to each other or 
> separate?
> 
> Whether or not you can model your ideas depends on how complex the 
> model is that you envisage.
> My model might be entirely different to yours so wouldn't we first 
> have to agree on the model?
> 
> Anyway AB definitely doesn't do frequency distributions and/or plot 
> them.

Actually I am underestimating AB - it doesn't do this automatically 
but if you like to program it is achievable (I haven't personally 
tried to push stats to the max in AB) e.g. look at the custom 
graphics capabilities.

look for "low-level-gfx-example-yearlymonthly-profit-chart" at the 
AmiBroker Knowledge Base

http://www.amibroker.com/kb/
http://www.amibroker.com/kb

Low-level gfx example: Yearly/monthly profit chart




> 
> 
> > 2. I would like to do a statistical analysis of how often Pivot 
> Point
> > S/R levels hold and see if there is any correlation to ATR.
> > 
> 
> I guess by Pivots that you mean the (H+L+C)/3 version?
> Once again you would need to clarify exactly what you want to do.
> Possibly you are mixing two ideas together there.
> 
> In Howard's book,Quantitative Trading Systems, he uses a 'hold for 
x 
> days' stategy to benchmark entries, which is a fair enough method.
> Volatility band crosses e.g. ATR bands is another method that I 
have 
> used.
> 
> Pivot S/R lines I would consider more as an exit method so I would 
> test the efficiency of them as an exit strategy (stop loss and 
profit 
> stop) in a different way (from memory Howard also gives example 
> methods for doing that).
> 
> I have done similar things using very simple, albeit rather tedious 
> methods, within AB (it is a good place to do it because I get the 
> visuals with the charts and also the Reports from Explorer to back 
up 
> the study). I start with the simplist logic that I can boil it all 
> down to and then see if I can do it in AB - if I can't, and it is 
> important, then it is time to go to another program - so far I 
> haven't found the need to use Matlab or similar.
> 
> Not to dissuade you though - often our own ideas (hunches) lead us 
to 
> the best outcomes, or 'learnings', when we follow them - I am just 
> suggesting you power up the ideas.
> 
> > 3. I would like to do a statistical analysis to see if there is 
any
> > bias as to when (time of day) the high and low occur.
> >
> 
> Kaufman provides a nice intro to this type of analysis in his 
> book "New Trading Systems and Methods" e.g. for S&P futures the H/L 
> near the opening or close are significant.
> 
> Pretty easy in AB if you have the data and the patience.
>  
> > Does Amibroker have any built in functionality that makes these 
kind
> > of calculations easy?
> > 
> > Bill
> >
> 
> Apparently it does!
> 
> So far I seldom use any of the stats functions and I have done 
> everything I wanted to do using simple methods. 
> I do work a lot in my head though - so that the 'lab tests' are 
well 
> organised,, and meaningful, by the time I get to do them (I analyse 
> to prove, or disprove, the hypothesis not to find one).
> 
> I do use Excel a lot because I am familiar with it (at an average 
> level of competency) - why scratch around trying to do stats 
analysis 
> in AB, or another maths program, when I can have the job over and 
> done in Excel - it is actually only two clicks away from AB (from 
the 
> users point of view what difference would it make if YTomasz built-
in 
> stats analysis - it would still be two clicks away at any given 
time -
>  I doubt if Tomasz will ever build the functionality of Excel into 
AB 
> anyway- after all Excel is a powerhouse in its own right so why 
> reinvent the wheel - it's just as easy to export to a specialist 
> maths/stats/graph program if you need it.
> 
> FYI
> 
> I did spend 100's or 1000's of hours in Excel studying the 'null 
> hypothesis' - the 'random walk' - otherwise known as an RNG (not a 
> super-dooper one I know but good enough for my purposes).
> 
> "Sometimes the best way find out 'what is' is to get a handle 
> on 'what isn't', especially if the little bugger is proving a bit 
> slippery to get a hold on.
> 
> Here's to lots more stats fun in the future!
> 
> brian_z
>




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