Stocktwits Launches Heatmaps

San Diego-based StockTwits, the investment and stock trading micromessaging service, rolled out a new feature this morning called Stocktwits Signals. The new feature creates a visual "heat map" of what users are talking about, allowing users to see what industries and stocks are seeing the most activity and interest and allowing users to click through to specific stocks they might be interested in following. StockTwits is led by Howard Lindzon, who is also known as an active angel investors.