1 interactive chart, similar to charts on Google. The choice of technology is your decision. This chart will be a part of a website.
The chart should be connected to "Google Finance Portfolio Data API" accounts with virtual stock portfolios (not individual stocks) and track the performance in real-time. In addition the chart should display summary results.
"...Google Finance Portfolio Data API
The Google Finance Portfolio Data API allows client applications to retrieve user portfolio content in the form of Google Data Protocol feeds. Your client application can request a list of a user's portfolios, retrieve performance and return statistics on an existing portfolio, query the positions and transactions in a portfolio, and create new portfolios and transactions..."