The pre-market high and low frame the overnight session; the opening range frames the first half hour of the cash session. Reading them together — how the cash open relates to the overnight range — is more informative than either alone.
Alignment: continuation
When the opening range forms above the pre-market high (or below the pre-market low), the cash session is confirming the overnight move — price accepted the pre-market direction and built on it. That alignment favors continuation: trade with the overnight trend, using the pre-market level as support/resistance.
Divergence: reversal risk
When the opening range forms back inside the pre-market range after price had broken out overnight — the cash open rejecting the pre-market extreme — that divergence warns of a reversal: the overnight move isn't being confirmed by cash-session participants. A pre-market high that fails as the cash session opens is a classic fade setup.
Opening range above the pre-market high = the day confirms the night. Opening range that rejects it = the day is arguing with the night — watch for a reversal.
How to use it
At the open, mark both frames and ask: is the cash session extending the overnight range or rejecting it? Extension favors continuation trades in the overnight direction; rejection favors reversal trades back through the pre-market range. Layer the regime on top — negative gamma supports continuation, positive gamma supports the reversal/fade. NoVo maps both the pre-market and opening levels so the relationship is visible, not something you eyeball.