The weekly rate of change, or 7-day change, is the difference between your trend weight today and your trend weight seven days ago. It shows the direction and pace of your weight, while the trend weight alone only tells you where you stand right now.
This number is more robust than comparing any two daily readings, because both sides of the subtraction are already smoothed values. Mathematically it equals the average daily change over a week, which is exactly what people mean when they say they are losing half a kilogram a week.
Example: Your trend is at 84.0 kg today and was at 84.45 kg a week ago. Your 7-day change is -0.45 kg. Relative to your weight, that is just over 0.5 percent per week. This is a worked example.
Weekly rate and percent
A close relative is the weekly rate. In the weight trend calculator and the app, it is the slope of a straight line through the trend values of the last 14 days, scaled to seven days. Both numbers are best read as a percentage of your body weight, because that makes goals comparable regardless of weight. Common guidelines are 0.25 to 0.5 percent per week for a lean bulk and 0.5 to 1 percent for a cut.
Reading it correctly
Because the trend lags a real change by about a week, you can only judge an adjustment fairly after ten to fourteen days. Adjusting after three days means correcting noise. If the change sits clearly off your target for two to three weeks, adjust your calories in small steps.