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A couple of years ago I built and tested several NN based models for stocks. I tried many variations regarding network topology, input data normalization, point of insertion of the network into the system and algorithms for weight updating. Since I was not satisfied with the ubiquitous back...

Ok.

I was referring to intraday data. 6 months seems a bit too much in that respect. GS

I think you should look into the API specification section. If memory serves me you can backfill up to 10 days. GS

Thanks. GS

Hi, May I ask you what is your source/provider of intraday data? Best of luck GS

Maybe. However if I used little or no backtest at all, trading with my own money I'd risk to run out of it or spend too much time before I find profitable strategies. I try to regard backtest just as a preliminary phase in system development. Personally I used to believe much more in it than I...

Jack, Unfortunately even that is not enough. It's a good starting point indeed, but the market may change the moment you go live with your brand new system. You test, test, test, then go live and the things are almost never as bright as your tests told you. Everyone loves certainty but we...

Still no single lesson so painful as to be remembered as "the most expensive". Several small not-so-expensive-but-annoying lessons though, such as sloppy typing on the keyboard while entering orders, bugs in my own software which caused minor losses etc. GS

Don't do it. Don't diasable the firewall for more than a few seconds just to perform some quick test. If you have to allow for some ports, then do it in the most restrictive way as possible (I don't know Norton AV/F), for example only for specific programs or source sites. Maybe you better...

Some of you guys are speaking about a housing bubble. I don't know US facts as well as residents of course but if we were speaking about Italy, where I live, I'd say there is probably no bubble at all. Houses prices went to the stars here in the last years, but then what would you have expected...

They have a proverb in Brasil: "Money doesn't buy happiness: it has someone else go buy it for you". GS

Please everyone also visit: http://darksun.com.pt/mirage/misc/faq_tre.html for a more detailed explanation of love and marriage. Too bad the actual "Treatise of Love" link is no longer accessible. GS

I always thought in eastern Europe live many logically-talented people. On the other hand, you have a clear demonstration that intelligence alone, without a political system which guarantees freedom, can't produce wealth. This is history. For the future we'll see, but you'll have to work at it...

http://www.free-av.com

You're mistakenly assuming that RISK and POSITION SIZE are the same. This is not what is usually intended. To say that you have a 1% risk means, generally, that whatever your position size is, you will close it when it goes against you more than 1% of your total equity. So for example you...

Well, what do you expect a server could do for you? Or do you just what to know what a server is? GS

Better yet, *outside* the working site. In my case, I carry them at home. GS

Quote from jumper: RAID 1 has saved me many times. And, its very easy and you don't lose a step. I thought it should have been this way. But, as I said, one drive got physically damaged and the other one logically. I arrived at my office in the morning and the screen was all blue. I...

I think one of the best methods for backup is partition backup. I use Acronis TrueImage software on removable hard drives. While it is not actually a 'one touch' backup system, TrueImage has a scheduler that allows for pre-programmed backup activities. What is really useful in partition...