If your market data is delayed, either your quote line will contain a yellow background or there will be yellow tick dots next to the bid/ ask prices (it depends on your Display settings). If the market data is in real-time there will be no yellow background, and the quotes will either be green/ red (the default colours; reliant on of the quote is on an uptick or downtick), or there will be green/ red tick dots next to the bid/ ask prices (also depends on your Display settings).
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