Carb cycling day 1

I believe you can do it in premium MFP, but not in free MFP. Premium lets you vary calories and macro distribution by day of week.

I've never experimented with it, so I can't tell you how it works exactly. The documentation might.

Me, I just try to hit my calorie goal, and get well rounded nutrition. That seems to be achieving my weight management goals (in year 5 of maintaining a healthy weight after multiple previous decades of obesity), and hitting my exercise performance needs.