MetaTrader4 (and MetaTrader 5) are the products of the leading developer of trading software, MetaQuotes Software Corp.
The MetaTrader 4 platform has been in demand for over 10 years due to its reliability and ease of use. What’s interesting is that often, under the guise of their own platforms, brokers and dealing centers offer MetaTrader4, just with a slightly modified interface. The popularity of the platform is achieved due to the numerous advantages that make it a top-rated platform. These include a convenient interface, functionality sufficient for novice traders, the ability to test and implement your own strategies, a simple built-in MQL programming language for creating bots, etc. Plus, the platform is free, there are no trading restrictions
Despite the popularity of these two options, it would be wrong to choose only from these two platforms (mt4 and mt5). The most rational approach is to fully compare all existing solutions using any financial solutions aggregator. This way you could evaluate your options and see what suits you best. There are plenty of options out there.