Day trading is the practice of purchasing and selling a security within a single trading day. A day trader can deal in a wide range of securities, including stocks, options, forex, cryptocurrencies, exchange-traded funds (ETFs), and even bonds. This type of trading became widely accessible in the 1990s and early 2000s with the creation of online trading platforms that moved the opportunity to trade from stock exchanges and brokerage houses to the internet. Before attempting to buy and sell securities online, novice traders should have a good understanding of how to identify market trends and directions, as well as an interest in learning how the global financial markets work. While there are professional day traders who work for financial institutions, day trading is also a solo activity that you can do at home on any computer or mobile device with access to a brokerage platform or trading software.