Uptime measures the percentage of slots in which the publisher has contributed to the aggregate price. A publisher is counted as up for a slot if they have published a price within the previous 10 slots.

The quality score measures how well a publisher's price series predicts future changes in the aggregate price. This plot depicts features of the publisher's price series that influence this prediction problem. The x-axis is the change in the publisher's price since the last time slot and the y-axis is the difference between the publisher's price and the current aggregate price. The color of each point indicates the change in aggregate price. A high-scoring publisher will have a smooth color gradient from the lower left to the upper right.

Calibration measures whether a publisher's confidence interval accurately represents their price uncertainty.The confidence interval defines a probability distribution over the difference between the publisher's price and the aggregate. For a well-calibrated publisher, the empirical distribution of these differences should track the theoretical distribution.