Yes , Link to Excel [RTD] should be active in Nest Trader , then only Real Time Quotes will come in Amibroker. You will have to ask the broker to activate the Link to Excel feature in Nest Trader.
When you right click Link to Excel , & you choose All Items or Selected Items & then paste in the Excel File then Real time quotes should appear in the Excel File. Only then it means that your Link to Excel is active.