Standard Ranking

How is Ranking calculated?

For standard ranking, we use a method that calculates the rarity score of a Piggo by using this formula:

Ranking Score = 1 / (Number of trait occurrences / Total numbers of Piggos in the collection )

The total Rarity Score for a Piggo is the sum of the Rarity Score of all of its trait values. This calculation gives good results and it is used widely in NFT marketplace.

To give an example of how the calculation was made, we will use the following traits.

Piggo \ Traits	Background	Type	Head
1	0.3	0.7	0.1
2	0.2	0.6	0.6

To convert these data to a rarity score, we will use the formula shown above and calculate the total sum of each trait.

NFT \ Traits	Background	Type	Head	Total Score
1	3.33	1.43	10	14.76
2	5	1.67	1.67	8.34

Hence,

Score of NFT 1 = 3.33 + 1.43 + 10 = 14.63

Score of NFT 1 = 5 + 1.67 +1.67 = 3.34

In standard ranking, the higher the rarity score of an NFT, the rarer it would be. Therefore in this case, NFT 1 is rarer than NFT 2.

Standard vs Statistical Ranking

There are several differences that can be found in both of the ranking, which are:

	Standard	Statistical
Formula	The sum of Rarity Score for all traits value	Multiply all traits together
Calculation Process	Need to know all traits collection to calculate	Easier to calculate
Rarity	Higher score is rarer	Lower score is rarer
Focus	Emphasize to single rare traits and includes overall trait rarities	Emphasize the overall level of rarities of all traits