The developers of Investoscope don't have support for this product anymore, which means that you can't buy it anymore. There is no price listed or something that could lead me to the developer's website, therefore you'll have to use another product that comes as alternative to Investoscope. It's called StockMarketEye and provides the same functionality as Investoscope.
Give StockMarketEye a try to see if it's suited for your needs.