Yesterday you started naming the direction before the number. Today, you sit with what direction actually means.
Today's idea
The arrow on a CGM is not a decoration. It's a forecast. A flat arrow means the line is stable — whatever you did is working, or nothing happening is winning. An up-arrow means the carbs side is winning right now. A down-arrow means the insulin side is winning right now. Neither winning is necessarily a problem. The arrow just tells you which side has momentum.
There's a metaphor from the Pro Tips that's stuck with thousands of listeners:
Think of a tug of war. A rope with a flag in the middle. On one side, insulin. On the other side, your carbs, your hormones, your stress — everything that pushes blood sugar up. The goal isn't for one side to win. The goal is for both to pull until they're exhausted, drop the rope, and the flag stays in the middle. The flag is your blood sugar.
From Pro Tip 1003
The flag is your blood sugar. The arrow tells you which side has pulled the flag furthest in the last few minutes.
An arrow is a forecast. I can see what's coming.
Sometime today, watch the arrow on your CGM through a single change — before a meal, during, and an hour after. Notice when it shifts. Notice how quickly. You're not trying to change anything; you're learning to see what's happening.
Pro Tip 1006 — Mastering a CGM
What did the arrow tell me today that the number alone wouldn't have?