OANDA, one of the longer-established retail forex brokers, has built out several of these connections. MetaTrader 4MetaTrader 4 has been the standard environment for automated forex trading for well over a decade, largely because of its Expert Advisor (EA) framework and the enormous library of existing MQL4 strategies. OANDA completed that integration, so a linked OANDA account can trade from TradingView’s charts across more than 1,700 instruments. API access for custom buildsFor traders and developers who’d rather build their own tools, OANDA publishes aUS Forex API. Trading forex carries a high level of risk and may not be suitable for all investors; you can lose more than your initial deposit.