It's ironic that the MT5 is geared to HFT scalping/trading, but the brokers that offer it charge higher premiums.
The Video from MQ: demonstration of the calculations on the GPU in MQL5 code and the graphics capabilities of the terminal
Форум по трейдингу, автоматическим торговым системам и тестированию торговых стратегий
Вот что можно сделать с OpenCL прямо в терминале MetaTrader 5 без всяких DLL
Renat Fatkhullin, 2016.12.10 01:10
It demonstrates not only the calculations on the GPU in MQL5 code, but also the graphics capabilities of the terminal:
Full source code in the form of a script is attached. The bug on OpenCL 1.2 was fixed.
This video was created by MetaQuotes. The script is attached to the original post here.
As to the brokers for MT5 so I just found information from MQ only:
More than 100 major brokers around the world offer MetaTrader 5
MetaQuotes and oneZero deliver Interactive Brokers Gateway to MetaTrader 5 with the ability to Trade on over 100 market centers in 24 countries, including NASDAQ and NYSE
And this is my MT5: