Cell Stats accounts for position-based clickability. Thumbnails at the top of a page are more clickable than those in the middle—users see top content instantly but have to scroll to see middle content.

Since identical thumbnails in different positions get different CTRs, you can adjust for this using a clickability coefficient (K) for each position. The most clickable cell (top row) gets K = 2; the least clickable (near the bottom) gets K = 1. This means 2 clicks in the top position are normalized to 1 click in the bottom position.

Example:

• Thumbnail A (top position) — 5% CTR
• Thumbnail B (bottom position) — 3% CTR

After normalization:

• Thumbnail A — 2.5% CTR (5% ÷ 2)
• Thumbnail B — 3% CTR (3% ÷ 1)

The script calculates each cell's K automatically over time. For reliable results, collect data from 20,000-30,000 clicks.

For New Sites:

If you don't yet have enough traffic (< 10k clicks), manually set cell K values and disable “Use Cell K” until you reach ~20k clicks.

Quick Setup:

Go to Rotation → Cell Stats → Manual Set cell K and set:

• Start = 2
• End = 0.5

This evenly distributes K values from top to bottom across the page.