Technical analysis is the art of forecasting future price movements by studying historical volume and price. When technical indicators are combined with charts, a powerful and profitable combination is formed. After listing multiple free charting resources, there will be a profitable strategy outlined at the bottom of the article.
Free Stock Market Charts with Stockcharts
This site is run by technical analysis guru John Murphy. A plethora of indicators and chart customizations are available. Many professional traders use this website. The free charts have a maximum of three years of historical data. The interactive annotation is a great feature.
Use Google Finance for Charting
This is a fairly basic charting resource with a small handful of technical tools. The sliding bottom bar on the chart for quickly viewing historical data is a helpful feature to examine decades of historical prices.