You can buy and sell in real time, which means that you know the exact price at which you are dealing.
Timing is everything when buying and selling.
Now all you need to do is tap the keys on your computer and you will have roughly 15 seconds to decide whether you want to buy or sell at the given price. The brokers can bundle together trades from many small investors to deal at the best rate available. Internet share dealing is just beginning to take off in the UK, but it looks as though it will start to follow American trends. In the US roughly seven million people are trading shares online, which equates to one in 20 share deals or around 200,000 trades a day. Online dealing is execution only.