[闲谈] I have a question

重新再测试

Why does stock change price instantly following the index?

If order was placed manually, at least, there should be 2-3 seconds delay.

If computers are trading, why do they have to trade on every point change?

Nage

looks like millions people set the point to follow the mkt every milli-second
重新再测试 发表于 2012-11-29 17:27

    i guess that is right. Then some of them set at certain obvious point. If there are enough people doing that, that point become resistant and support point.

重新再测试

looks like millions people set the point to follow the mkt every milli-second

Nage

It is obvious the computer trading mkt. But why did the human being set the program to respond to ev ...
重新再测试 发表于 2012-11-29 17:17

you set at point 0, he set at point +1, the other set at point + 0.5

end up every little move trigger something else.

重新再测试

if the computers trade every m-second, how much fund they can put into the mkt and make money? just for fun?

aimei

回复 3# 重新再测试

I never understand

重新再测试

It is obvious the computer trading mkt. But why did the human being set the program to respond to every point change

Nage

Why does stock change price instantly following the index?

If order was placed manually, at least ...
重新再测试 发表于 2012-11-29 16:59

not 2 ~3 second! I know some of the HF get high speed data feed just to save millisecond. So i think the system are very wildly connected instantaneously.  now, who lead who follow, I do not know.