This is lesson 12 of the series. If you want to place a trade, you need to make a Market order. You can do that easily by clicking the New order button in the standard tool bar. Alternatively you can double click on the Market watch window or by right clicking on the chart. In the Order window you can select lot size, stoploss, take profit, type of order, buy and sell orders.
To close a trade, right click on a open trade on the terminal window and when a fresh window pops up, choose close button to close the trade.