For lesson 7, question 4 [It's time to make your own! Let's do what we did before and bring i down from 2 to 0. This time, fill in the conditions in the for loop using what you learned before.], when I run into infinite loop, my browser gets stuck.

Just of curiosity, I would like to know whether that event affects the server badly, if I keep my browser open?

thanks for the question. we're running everything client side, so it's only your browser that's getting stuck. we're working on a fix for this too!

A fix to the halting problem?

Jokes aside, timing out would be useful.

Haha!

A Firebug like prompt is the plan i.e. "Script is taking too long to finish, do you want to stop it..." maybe every (n * X) time interval for n is every time the msg is shown for a specific peace of code.

Cool! Thank you.

Thank you. I have a feeling that my brain works best during nights, but I have to start tuning to overcome that feeling.

It's worth noting that some humans are shifted into the evening. Morning-persons and night-owls seem to have held different advantages to our species once we domesticated dogs. Morning folks catch the first rays of light for the day's labor, night folks tend the watch fires and keep intruders away while the bulk of the humans sleep.

That's an interesting idea. Is there any additional reading related to this?

Of course. The following Wikipedia article has several references: http://en.wikipedia.org/wiki/Chronotype It is also worthwhile to do a Google Scholar search with the query "evolution eveningness".

Ah, quantum teleportation is the promising one to overcome current propagation delay.

what do you mean? transmission of actual information from quantum entanglement based results are still bounded by classical channels.

Awesome! I am more than interested to step into. Could you please shoot me an email to aliengeek4u at gmail dot com

I will shoot you an email in the morning.

I used to trade Forex (had a small startup). I'm looking to get back into the game. Currently working on a few algorithms that I'd like to test out, soon. I'd love to bounce some ideas around with you. Email is in my profile!

I've been tinkering with Forex at eToro. I can see ALOT of potential there, I would also like to chat about it with you as well. I will contact you shortly.

Waiting for you email!

I apologize, I've been in the middle of a move.

I posted my contact info @ HNofficeHours : http://hnofficehours.com/profile/a904guy/

Tarsnap is great

Add to the list http://helwr.posterous.com/trading-354

Thanks for alerting me! I am a newbie to this field, but love to explore the pros and cons of the current algorithms used in HFT. Sure! I will.

Yep, exactly! Any thoughts on opposing this approach?

It can be a good approach. Make sure you have a good source of historic price data to come up with the best strategies.

I was thinking to grab the data either from Yahoo finance or Google finance. If I remember right, it allows me to get data from past 5 years only. Do you have recommendation for any other resource?

Yahoo and Google are your best bets for historical prices. Just use the adjusted closing price (not the open or unadjusted prices).

Also, what you call a key area is referred to as a "sector" in investing. There are many ETF managers that try to track the various sectors, though your easiest bet might be the Sector SPDRs. Their webpage already has a correlation tool if you just want to use theirs:

http://www.sectorspdr.com/correlation/

Simply enter one of their ETFs (eg. "XLF") and look at the correlation of the other Sector SPDRs.

Thank you for the link. From your experience did you notice any immediate correlation between the sectors or any time delay? If there is some time delay, it might be a key feature to notice for short term trading, sounds right?

Um, what you're referring to is a form of high-frequency trading. For that you'll need (1) a direct connection to the exchange, and possibly even co-location; (2) historical tick data for backtesting; and (3) the hardware and software capable of executing the logic. The kinds of time-sensitive arbitrage opportunities you're hinting at take a TON of skill and start-up capital to perform.

Basically, if you haven't done this kind of stuff before, this not the type of strategy you should start with.

Programming from the Ground Up by Jonathan Bartlett.