as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
buy/selling prices at the stock exchange represent someone selling/buying at that price?
user
you don't see buying and selling. you see bid and ask. best bid--highest price someone is willing to pay to buy a stock. best ask - lowest price someone is willing to accept to sell a stock. as for your second question, if you can look up accumulation/distribution algorithm and iceberg order, you will get basic idea.
assistant