# Existing Allora Appchain Topics

Some useful topics have already been created

The Allora Appchain already contains the following topics. Below, you'll find the topic ID, name, and a brief description for each.

**1: ETH**. This topic collects projections of the future price of Ether in 24 hours. The weight-adjustment logic scores inferences using a simple L1-norm between the projected price of each worker and the current USD-denominated price of Ether as per CoinGecko.**2: yuga**. This topic collects index levels for all NFT collections under the "Yuga Labs" brand umbrella. The weight-adjustment logic scores inferences by calculating the distance between each inference and the median of all inferences of the same inference epoch.**3: NFT appraisals**. This topic collects predictions of the next sale price of any PFP NFT. The weight-adjustment logic scores inferences by calculating the distance between each inference and the median of all inferences of the same inference epoch.**4: watches**. This topic collects predictions of the next sale price of any watch supported by Watches.io (opens in a new tab), which is an RWA marketplace for NFT-wrapped watches. The weight-adjustment logic scores inferences by calculating the distance between each inference and the median of all inferences of the same inference epoch.