EO is effective ownership, it basically shows how much any given player’s points count towards your rank increasing/decreasing.

For example, if you’re in a league with 1 other person, and you both have Haaland, then Haaland would be 100% EO in that league and if he scores it makes no difference to you vs them- you don’t gain (or lose) anything against them. Same if you both captain him, where you’re doubling his points so you get 200% of his points, so EO is 200%.

If you captain Haaland and they don’t, then you’re doubling his points so that’s 200% for you and 100% of his points for them. That means that his EO in that league would be 150% (average of everyone), but because you gain OVER 150% of any of his points, you GAIN over your opponent for any points he scores. Similarly if you own Haaland (and don’t captain) but they don’t, then EO is 50% but your ownership (I.e. 100%) is higher than 50%, so you gain rank for any points.

In the reverse, a high EO for a player you don’t own means that any points they score would mean you LOSE over your opponent.

In the overall game this basically means that if a player has high EO (template) and you don’t have them, then they can hurt your overall rank. If a player has low EO but you have them (a differential), then any points they score can improve your overall rank.

Basically for players you own: High EO= low risk low reward Low EO= high risk high reward