Technical Analysis:
Moving Average: Use this line to help spot underlying trends in a stock's price movement. A moving average can also help guide buy/sell decisions: When a stock's price moves from below its average to above, it may be time to buy. On the other hand, it's considered a signal of weakness when the price breaks through the moving average in the downward direction.
Regression Line: Like a moving average, this "closest fit" line can measure price trends that might otherwise be masked by less important short-term fluctuations.
Bollinger Bands: These are designed to highlight only the most significant changes in trend direction. The lines drawn represent the typical high and low amounts of a stock's price fluctuation. A movement past either line is said to indicate a strong trend that's likely to continue.