Does anyone recall what the "OpenBuy" and "OpenSell" lines in some older setups' ADR was? I don't see it in the newer setups

It seems that the indices in particular react quite strongly and consistently with this level and it can be really useful, though I can't figure out what it is.

It may be related to previous day's pivot, a certain percentage of ADR or some old TRO stuff. Dunno.

Attached is a button version of the ADR where it can be found.

Any insights appreciated...

XARD The Open Buy/OpenSell was geared around the 10% ADR, I removed the labels and added the 10% ADR label on the chart.