Buy Low - Sell High - we have all heard that and probably repeat it often. But the truth is, well it is hard to achieve. Many investors react to falling prices by selling, attempting to preserve what capital they have invested. Often that trade comes late and now you have done the opposite, "Buy High - Sell Low".
So how do we "Buy Low and Sell High" in that kind of scenario. One technique is "short selling". Selling short means you sell the asset before you own it, believing the price will fall. Take a minute to watch this video to learn more about short selling.