IBKR is a leading global online broker which provides an advanced trading platform, a large selection of tradable securities, and low fees. It also launched IBKR GlobalTrader, a modern mobile trading app for stocks, ETFs, and options.IBKR is a leading global online broker which provides an advanced trading platform, a large selection of tradable securities, and low fees. It also launched IBKR GlobalTrader, a modern mobile trading app for stocks, ETFs, and options.