Yes this the the good thing to use the software development and the online trading system. this is more convenience and profitable method in the trading history.
But as you saying that it is just like other markets i am agree with this.
http://robotictradingsystems.com/cooltrade/videos
Best place for the stock exchange and the trading system is i hope in these days is the a network place means the on line community and the on line agencies, they helps to make the good contracts in trade.
so this is the online trading system in these days...
The weekend trading it sounds cool. there will lot of brokers and the traders also there to push the demand and supply to earn their profit so i like the on line marketing. this is so helpful for the trading system.
http://robotictradingsystems.com/cooltrade/videos
In trade and business every thing can be happen the prices can drop and also can increase further increase it is all depend on the time and the the ration between supply and demand.