What's the difference between MT4 and MT5?

Additional MT4 VS MT5 differences

Besides the fundamental difference between the two platforms, a lot of additional features were added to MT5. While MT4 has four types of pending orders available, MT5 introduces 2 additional pending order types. These allow limits to be placed on conditional orders. This gives you more control over stop-loss orders.

MT5 has 21 different timeframes, compared to MT4’s 9 timeframes. The 9 timeframes included with MT4 are fairly standard. MT5 adds 2,3,4,6, 10, and 20-minutes charts and 2, 3, and 6-hour charts. MT5’s strategy backtesting is far more advanced. It is multithreaded, which means multiple simulations can be run simultaneously. For anyone creating automated strategies, this is a major advantage. Tick data and 1-minute data is also handled differently. With MT4 you need to download this data manually. In MT5, it downloads and updates automatically. Time and sales data can be accessed on MT5 which is relevant to stock traders.

Although MT4 includes most of the standard indicators you would need, MT5 includes 8 additional indicators. This is not an important difference as any indicator you need can be downloaded and added to either platform. MT5 also introduces several new analytical objects to identify cycles and trends. Perhaps the biggest difference besides order and position handling is that MT5 can easily be used to trade multiple asset classes, with multiple accounts, using more than one currency. MT5 also allows you to set up more than one trading account and then transfer cash from one account to the other.