Part: Part Nine - Inflection Points: M, Q & the Zones

The Orange zone: never just call

Pre-flop
Blinds 400 / 800 (100 ante)Pot 3,900 (4.9 BB)Your M = 8 • Orange zoneCOA♦10♦● 16,800 (21 BB)YOUto actMP● 16,800 (21 BB)Openerraises 1,800 (2.2 BB)SB● 16,800 (21 BB)posts 400 (0.5 BB)BB● 16,800 (21 BB)posts 800 (1 BB)D

Orange zone (M 8). A player opens to 1,800 from middle position and it folds to you on the cutoff with A♦T♦.

Orange zone, MP opens, you hold A♦T♦. Best?

WhyThree-bet shove. At M 8 you shouldn't flat - calling leaves you in a bloated pot with no fold equity and no room to maneuver. A-T suited jams for value and fold equity, or you fold; never just call in the Orange zone.
What happensYou shove; he folds.  Jam or fold - don't flat.
In the Orange zone, calling a raise is the worst option - it commits chips with no fold equity and no post-flop maneuverability. Three-bet jam or fold.

Orange zone: don't flat raises - shove (for value or fold equity) or fold; flatting leaves you stuck with no fold equity.