If you go to the Trading Center in the "trading" tab, they should have all of your positions listed out for you. They will show current value of each stock based on price and shares owned. They should also include profit/loss readings for both raw dollar changes and percentage changes. At the bottom of the ledger, they add up all those current values of your positions and also of the profit/loss numbers, and you will have current total value of all the positions you own, and the raw dollar and percentage values since you bought them. Cash value is just money you put into your account, but have not used to buy positions with yet. Position Balance + Cash Balance = Total Equity.
Say you start with $3000 dollars and buy 100 shares of stock and $20/share of stock in company Whatever on Monday. Your position balance will be 20 x 100 = $2000. Cash balance will be $1000. Now come Friday, your stock has gained 5%, a $100 increase in your position balance. Cash balance (assuming you didn't buy or sell anything) will still be $1000 and your position balance is now $2100 dollars, so Total Equity is $3100. Your positions gained 5%, but your total equity only went up 3.3% because the cash balance stayed the same.
Also, zecco only updates some of those values in your account at the start of the next business day, so you might not be seeing certain results right away. So don't fret if they are not there lickity split. But the numbers will fall into line the next morning.