This game allows you to use your virtual cash of 100k to Buy/Sell stocks and build your portfolio, each buy/sell will reduce your available balance by 5.95 commission/fees.
The stock prices can be refreshed to get the current market prices and re-calculate your portfolio value. These are indicative prices which do not reflect the current real market prices since these quotes are delayed by few minutes.
So start playing and compete with your friends in building a good portfolio and make more virtual money to be the winner.