Level 1 bid and ask sizes Interactive brokerson US stocks are incorrect in my opinion

This is a discussion on Level 1 bid and ask sizes Interactive brokerson US stocks are incorrect in my opinion within the Brokerages forums, part of the Commercial category; Hi fellow traders, Yesterday I found out that the level 1 bid and ask sizes for US stocks are incorrectly ...

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Old Apr 16, 2009, 10:47am   #1
Joined Jul 2005
Level 1 bid and ask sizes Interactive brokerson US stocks are incorrect in my opinion

Hi fellow traders,

Yesterday I found out that the level 1 bid and ask sizes for US stocks are incorrectly updated by Interactive brokers. The bid and ask sizes are only updated when either the bid or ask price changes.

I have checked this with the market depth level 2 in IB and when I compared the cumulative sizes on the bid and ask of level 2 with level 1I noticed that the sizes in level 1 are not updating in real time.

I have contacted IB and the helpdesk confirmed that there was a difference between the level 1 and level 2 sizes. They have notified the department and they are looking into it.

So if you are trading also based on level 1 data, please check it with the level 2 data.

I hope you do not have this problem, but if you have the same issue please send a ticket to IB about it.

Kind regards,

thevinman
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