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
how's the graph of after/pre markets be drawn?
user
the data source is the same as the live market trading. pre and after market trading are active markets and there are actual buyers and sellers getting their orders matched.
assistant