Market Screener is designed to give invstor a simple market overview. It is still under development and you may expect to see changes on regular basis.
Select specific screener in the left side menu. Market screeners designed to help you quickly identify advanced / declined areas of the market or find prospective stocks for a specific account type or strategy.
For example, if you have startegy to trade earnings, there is an Earnings Screener available. It shows high profile stocks (high volume, price is above $50) that are scheduled to report earnings in the next two weeks. Usually, it is enough time to set up the trade. The Earnings Screener can also be used to set an expectation for the market behaviour - usually the large number of earnings reports mean heavier volatility on the market and also can define short term market trend.