Futures
Simple Syntax
For futures that have multipler Multipliers (e.g. DAX has 5 and 25), Simple Syntax is not adequate to define the contract uniquely. Mixed Syntax can help to add addition specification for the Multiplier.
=RTD("Tws.TwsRtdServerCtrl",,"ES@CME//FUT/201712///USD", "Bid")
Complex Syntax
The LastTradeDateOrContractMonth and underlying Symbol can be replaced with the contract’s own symbol, also known as LocalSymbol (named as Symbol within the TWS’ Contract Description dialog). Local Symbol is not available in Simple Syntax.
=RTD("Tws.TwsRtdServerCtrl",,"loc=ESZ7","cur=USD", "exch=CME", "sec=FUT", "qt=Ask")

