compare MBT and IB quotes

i wrote a program to download the IB and MBT bids to compare them.
i used Ninjatrader to insert data into a mysql table all the bids that were occuring on both IB and NT.
i fould that out of a sample of 22243 quotes with matching timestamps(accuracy to seconds)
matching bids=9496
not matching bids=12747
the IB bids were higher than MBT=10910
the MBT bids were higher than IB=1837

Is IB that bad that they are providing such a bad quality of quotes.

attached spreadsheet with non matching bid info.

Remember, forex is not a centralized market, the quotes will be different depending on from where they are sourced. As for the quality of the live quotes, in my experience both IB & MB are pretty ropey, one need good tick filtering, but that is what you get for free.

Your results seems odd. IB quotes in 0.5 pip intervals and MBT in 0.1 pip intervals, but your bid prices are all in 1 pip intervals as far as I can see. Since MBT has a higher resolution this might potentially skew the result.

Also you should consider comparing spreads and not just bid prices.

what do you mean. they look similar to me. i dont see IB to be in half pip.
Basically these are output bid/ask from NT script. From NT perspecive USD, GBP symbols have pip values are .0001
the JPY one are .01

just a snapshot of the data is below.
http://screencast.com/t/NmYzMTM3


http://screencast.com/t/NmYzMTM3

http://screencast.com/t/NmYzMTM3

Then its your data feed...

Check out IB and MBT's respective sites:

http://individuals.interactivebroker...?ib_entity=llc
http://www.mbtrading.com/forexFeatures.aspx