What is a leverage (margin) trading?

Trading with leverage (also known as margin trading) means to trade securities using funds, borrowed from a broker.
To trade with leverage, you have to open a trading account, set the level of leverage for each asset class in Settings > My accounts > Trading options > Leverage and deposit a certain amount of money, which will literally serve as collateral of our loan to you. 
Leveraged trading offers you exposure to trades and profits on a large scale. Consequently, it involves greater risks as well.