Similar to New Position or New Entry Order under Trade menu, you can also place an order by right clicking on the chart of a symbol you want to trade. Click the same options. However, if you want to close the position of your symbol, simply click Close Position tab. You can either close it with the current price or set an amount where you can take profit or stop the lost.
You can also do the same actions by right clicking the symbol under market watch and hitting trade symbol.