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camping89 has contributed to 2 posts out of 21193 total posts (0.01%) in 3,592 days (0.00 posts per day).

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Thanks a lot, I'm using IQFeed 5.1 protocol. And I can see the n,QPPG now.

This solved my problem.


My question is same as topic name:

How to check if Level 1 symbol is invalid?

I send wAAAA.TES\r\n as a watch command for example, but I don't receive anything from level 1 port. My expectation is some kind of messages like "Invalid Symbol" or I should check if AAAA.TES is valid before sending.

By the way, what is different between watch(w) and trade(t) command?
wMSFT and tMSFT...


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