Sites like Yahoo began by offering basic stock charts. That was a while ago and welcomed. Now they added interactive charts. While they do not offer all of the technical analysis you may want, it is a great start. You add indicators and change the moving averages. Also as you can see below they have candle stick charts, bar, area, and the typical line. My only complaint is that they are missing some obvious ones like OBV (on balance volume and others). Try the interactive stock charts here, as an example AMD.