Re: What's the difference between the bid and ask price
Yes, you can tell your broker to buy a share up to a price of €6. If you do this, the broker will buy as cheaply as possible, but will not pay €6.10 for it.
The whole process is electronic. If a seller puts in his ask price of €6.20 and your broker puts in his bid price of €6.00, they will be visible to the whole market. If the seller wants to he can click on your €6 offer and sell the shares to you.
Your broker may exercize his discretion and not input your bid of €6, if he feels that the ask price may drop.
Brendan