Used to be I had to roll each chart individually. It's nice that Sierra does them all for me automatically.

Rollover is today officially. I personally dont change to March until tomorrow/Monday when the volume on March is higher than December. Right now the Dec. volume still higher.
I thought this was a great change. Makes much more sense doing it every 3 months rather than quarterly.These used to be every quarter or so -- now they're every 3 months, which seems like no time at all, as time goes on.
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My ES contract says 20 Dec 19 expiry