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

Yellow zone: value your chips

Pre-flop
Blinds 400 / 800 (100 ante)Pot 3,900 (4.9 BB)Your M = 13 • Yellow zoneCOA♠Q♠● 27,300 (34.1 BB)YOUyou opened to 1,800BTN● 40,000 (50 BB)Big stack3-bets 12,000 (15 BB)SB● 40,000 (50 BB)posts 400 (0.5 BB)BB● 40,000 (50 BB)posts 800 (1 BB)D

Yellow zone (M 13). You open to 1,800 with A♠Q♠ and a big stack who covers you three-bet jams all-in.

You open A♠Q♠ and a covering big stack jams over you. Best?

WhyFold. Against a jam that covers you, A-Q is at best flipping and often dominated by A-K or Q-Q+. With M 13 you don't need to risk your tournament life in a marginal spot - fold and keep maneuvering. The Yellow zone is about valuing your chips.
What happensYou fold.  No need to flip when you still have maneuverability.
In the Yellow zone you still have a workable stack, so you avoid unnecessary all-in flips that risk your tournament life - you value your chips rather than gamble them in marginal spots.

Yellow zone: value your chips - avoid risking your stack in marginal flips when you still have room to maneuver.