shu

thank you very much! Now it is working after I change the source from yahoo to IB.

bid/ask/last are 41.34/41.35/41.6 and TWS shown 41.59/41.60/41.60. If I close TWS, MT pop up the warning that the data will not update, and MT still show the same problem I said before. MT is the only app connecting to IB. Also I use another computer which I use Ameritrade to connect MT and the Bid/ask/last show the same quotes.

no, not the same as MT, only the last is the same as MT

when I look at the same symbol in TWS it shows bid/ask 41.34 and 41.35 for BAC symbol.

yes, the quote are updating during marketing hours but not extended hours. and the quote during the marketing hours shown look like the delayed quote. for example when the bid is 41.34 and the ask is 41.35, the last quote is 41.6.

last month, my raw data did not show bid and ask after hours, and during market hours the data shown on bid/ask are delay. I use IB for data source.