Two books, two opens
Globex locks at 18:00 ET. RTH locks at 09:30. Each set starts on that bar and only grows while that session is live. Nothing hangs across the week unless you keep history on.
Reachable, then precise
Sigma is last night’s range for cash, yesterday’s range for Globex, floored by daily ATR. Inner and outer rails sit at 0.32σ and 0.62σ from the open. When a completed high or low sits within twelve points, the rail snaps onto that print.
A side may go quiet
The lock is two ask and two bid. After the open, fifteen points through a rail retires it. A trend day will clear one side. That is the book being honest, not a missing feed.
What it will not claim
This is a session map, not a 15/20 bounce script and not an order-flow black hole. It does not promise four reversals a day. You already know how you fade or follow. This tells you which prices were struck at the bell.