Barchart.com is quite possibly my favorite website for everything related to stocks. I still believe Marketwatch is better for fundamentals, but for intraday traders Bar Chart offers great tools to help you spot runners or to give you ideas on what others are doing the market.
Barchart Features (Free with Paid Features)
Fundamentals (Marketwatch is my personal favorite for fundamentals as it offers percentages of growth or decline for fundamentals)
Implied Volatility (IV Rank and IV Percentile which are useful for option strategies)
Analyst Ratings
Options Section (Offers free and sortable information, but delayed)
Unusual Option Activity
IV Rank and IV Percentile
Most Active Options
Options Volume Leaders
Change in Open Interest
Gap Ups and Gap Downs
Great way to practice gap plays (see Gaps)
Gap Downs are typically stronger than Gap Ups
Sector Map
See which sectors are doing well or poorly (1D, Week, Month, etc)
See individual stocks within the sector to see which are the fast movers or laggards
Sort by volume to find the runners
Another source for economic news