Quote from MarkB:
Thanks 3dog, that explains it. The time corresponds to exactly where that one tick shows up for me.
Any idea about the low on the 11:00 bar? (Since you seem to be a data guru)
They reported a single trade of 973.10 at 10:57:12. So 973.10 looks correct for that 5 min bar.
I say 'looks' because the only way to really know what happened in a market like SP is to be in the pit as it happened.
)