StockCharts.com : Excellent for "technical purists" and education.
: Provides over 100 built-in indicators like RSI and MACD to help you define your own triggers. free stock charts with buy and sell signals
: The "Technicals" tab automatically plots "Bullish" or "Bearish" events, such as moving average crossovers and head-and-shoulders patterns, directly on the chart. StockCharts