Similar to its older sibling MT4, MetaTrader 5 (MT5) is a very popular forex and CFD trading platform developed by the Russian software company MetaQuotes Software for the retail trading market. The platform is used by a large number of brokers around the world, including many high leverage forex brokers.
Despite MT5 being newer than MT4, many high leverage forex traders still remain committed to the older version. Part of the reason for this is that the MT5 was not backwards compatible with key features of the MT4, such as the huge library of trading algorithms, or Expert Advisors, that is available in the older version. Many developers of trading algorithms also preferred the programming language of the original MetaTrader, and have therefore stayed with this instead of upgrading to MetaTrader 5.