It is a German TA site, which is based on MS's Active-X, so before you can use it you got to allow the installation of some software components on your computer. It's best used running Microsoft Internet Explorer.
If you go to the link above, click "Charts & Tools", then click on the "TradeSignal Basic" which will prompt you to allow that software download. As a non-subscriber you can only access daily, weekly and monthly charts, no intraday. They have all US shares and indexes though, and a rather nice arsenal of technical indicators. I particularly like that you can overlay indicators on the price chart like I have done here with the MACD:
If you find some time to play around with it, if interested subscription is 9.95 Euros a month which gives you intraday charts as well (prices are just near-time, even US indexes, but still...). There is a chat as well, where charts from within Technical Investor can easily be posted with any annotation you would like.
Don't worry about it being in German, the indicators are easy to realize for foreigners as well as long as you know the indicators. GGG. Just a hint, FYI.