Actually, what that graph shows most is the water gain peaks I get after heavy activity followed by a drop down low as my muscles heal and my osmotic balance rebounds. You can see that I tend to do big household projects on Sunday after weigh-in and my weight goes up for 2 days afterward with water retention in the muscles. Then it drops back down and tends to go low before returning to balance. It happens every time.
On the 14th, I did my house project before the weekend so you see the peak before weigh in.
Today I removed the built-in microwave over the stove and tomorrow I will install a new one. My weight will then go up for two days before dropping back down like clock work.