Futures data, huge discrepancy

I am trading the YM futures and changed all my charts to the new contract last night.

The problem is that the DEC YM is now 80 points higher than the SEP YM. That has completely screwed up my indicators.

Anyone else having this problem and can I correct it?

How lobg can I realistically trade SEP before volume drops and spreads start to widen?

 

Use the continuous contract until the YMZ fills in.
Or Use data from Sep and trade the Dec.

Sounds like this is your first Rollover!

 

Delete all of your futures data prior to the rollover and trade off of the cash for a couple of days.

 

Happens at every rollover day. Trade/use the Sep contract and make the switch tomo.

 

I have an even better idea, take the rest of the day off and go fishing!