Let's suppose that some trader knows something, that most of other market participants don't know.
That knowledge may be directly related to the stock market e.g. number of open long positions below/above current price or view on whole limit order book. Alternatively that trader may know that there will be an event in given company that will cause a price change.
How would this trader use that information in order to get profit? Does this trader use some strategy against the others? If so, how does this strategy may look like?
I am interested both in micro-scale activities of well-informed high-frequency traders and activities done by insiders.
Thank you in advance.