[UrmaBlume]

Originally Posted by Frank »

usually best to ignore 'hater' posts like this but I will chime in with why..

you are paying Tradestation for their software, not for the data -- which is a commodity and 'should' be free, just like it is for stocks on Yahoo. would you pay $1200 a year to have access to the time of day? of course not, it is a free add-on data feed with your computer.

personally, I used Tradestation for years and moved away from it. I find it more appealing to manipulate data in my own way -- not through Tradestation. I have a solid database of data --- but it would be nice to have a place to reference when you do care to expand your own database of data for new markets or different timeframes. the net net answer to why? because in a world of peer to peer networking through the internet, it SHOULD be accessible for free.

Sorry, not a hater post at all.

The db you propose is very limited as to time frames and symbol list. Such a db is only suitable for a very limited trading/research operation. For any "REAL" trading or research venture $1200 per year for unlimited data is very inexpensive and if one's trading or research won't support that, then, indeed, such an ersatz approach would be appropriate.

Of note is that commercial data feeds like Trade Station are at the bottom of the line. The big boys use direct, near zero latency feeds that cost over $20,000 per month. No matter what you build you can't get that for free. The only reason they pay 20k per month is because they make money by using it.

If free one hour data on 10 symbols fulfills your needs then my all means this is the app for you. I run a small private trading and development operation and could neither trade or develop with the data you describe.

[Frank]

yes, historical data fulfills my research needs. Whether you pay nothing, $20k per month or $12 million per year (as my old firm paid in annual investment infrastructure), guess what? its the same data.

you missed the point by trying to pigeon me into one-hour data and condescending about your 'private trading operation' --- whatever bro, I am not talking about data delivery with zero-latency for trading -- I am talking about historical data. there is a difference. there is no edge in zero-latency raw-compute power. my trading platform with 'infintesimally higher than zero latency' is just fine.

in the future, just try to think about the fact that other people might do things differently than you do. there are many different ways to skin a cat and trust me, you don't know all of them. neither do I but the difference is I seem to be aware of this fact.

[UrmaBlume]

Sorry Frank,

My questions regardiing your approach to data collection and managment are about practicality.

I and every professional trader I know would find such an approach to be not practical and that to be able to access unlimited data, either real time or historical, for any symbol or instrument at any time to be well worth what we pay.

Obviously your approach to data collection and management is adequate for your needs so it is the right one for you.

After almost 30 years of professional/management level involvement with the markets, I do, indeed, understand that there are many ways to profit from trading and just didn't understand why anyone would go to the trouble to build such a seemingly inadequate system just to save a few bucks. The answer of course is that it is not inadequate for your needs and thus is perfect for you.

I didn't mean to criticize of belittle your approach, I just didn't understand how anyone could go to that effort to get so little just to save a very few bucks. Now I know and wish you the best of luck.

cheers

[Szymon]

Hi Guys,

Thanks for your valuable input.

At this stage I am happy to take the hourly information, I use this information to calculate future high probability time reversals plus other things and also I wanted to see if this is all possible, to contribute towards this project and share this information like opensource project.

Here is a simple OpenECry connector, you can sign up for an API Login from OpenECry and use that to login to this test system. On the next system l will put some basic functionality on the form, just to see what kind of information they are offering.

Just extract the folder and double click on the OpenECry_Connector.exe file about 26kb. A form will pop up and then put your login details in, then you will get a test message if all went well.

Regards

Simon

[BlowFish]

Originally Posted by UrmaBlume »

Why?

Decades of data in every time frame from 1 minute on up is available for every symbol from several different vendors for very little money.

Trade Station at $99 per month, free with just a few trades, makes all of this data available and it can be easily exported from TS into either a csv file or via dll to any database you want.

Plus with all the great open source db's available why MS db?

For Historical data you can get a free trial for TS and download what ever you want.

Is the sole reason for this app to save $99 a month? I don't get it.

I don't know what TS provide history wise but I would be surprised if it really does offer 'all the data you could want'. For example can you can load every tick of the ES since ist inception for example (complete with proper time stamps). What about the DAX FTSE CAC, what about more esoteric instruments? Data management is a pain but at least if you do that yourself you know you really do have everything you could possibly want andthat it has been collected and stored accurately.

I cant answer for Syzmone but why would you lock yourself in to an archaic propriatory product like TS? I presume the point of the project is so that you can connect your database to numerous data providers (including TS) and allow it to be queried by any client application that you can dream of.

Don't get me wrong TS is a great product for quick prototyping of ideas but as the cornerstone of a project to collect and manage financial time series data wel in fact TS as the cornerstone for any 'big iron' type project .....well no comment but good luck with that.

I do agree with your comment on the choice of database. SQL isn't ideal in the first place but despite that is still adequate. Going open would seem to make more sense to me too.

[Szymon]

Hi All,

Can someone tell me why MS Sql 2008 is not good for this, what have you experienced with this product and do you have any suggestions something else that is better than this product.

Here is a link to the MS Website for this product.

Microsoft SQL Server 2008: Overview


Simon

[uexkuell]

About ways to store large data sets please notice this extensive discussion (you may have to register first to get access to the yahoo-group):

Yahoo! Group TWS-API: Has anybody tried some sort of database?

It is a discussion group of people who are writing programs for IB (Interactive Brokers) API.
Anyway the discussion is relevant for everybody who thinks about saving (and accessing) a big amount of data.
Answers your question about SQL also.



Another thing that might deserve your interest:

Esper - Complex Event Processing

A free, open-source and working event-processing project.

[BlowFish]

One question to ask ...are SQL databases good the best way to store sequential data? Answer is probablly no. Does it matter that much? The answer is again probabbly not. Chances are the yahoo group that was linked will give you a much better idea of pros and cons.

Having chose SQl (which is certainly not wrong) then the only choice is which implementation to go with. To be honest I don't really know the current pros and cons, it's years and years since I have had to seriously evaluate DB products. Intuitivly an open source implementation seems to make sense for an open source project. There are many things that could blow that feeling right out of the water. Your preference is one of them