I usually use NQ and YM continuous contract ( NQ ##-## Globex, YM ##-## Globex ) on NT with Esignal data and noticed that around expiration day last week there is a big difference in data between the 6/09 contract symbol ( NQ 6/09 Globex ) and the continuous contract symbol ( NQ ##-## Globex )
What am I missing here and can you suggest what I can do to avoid trouble in the future ?
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