Like Uniswap we use a similar but improved CPMM algorithm to determine a real-time decentralized trading price for any ERC20 token that is listed and traded in the exchange. Unlike Uniswap or Bancor we use exactly the same volume of issued token as the base, and we don't use ETH or BNT whose prices in USD fluctuate hugely to form a trading pair but use a stable coin NDAO instead. In any trading pair a token is priced in the stable coin NDAO. At present, NDAO‘s price is determined by ETH's US Dollar price, means 1 NDAO is equal to 1 US Dollar. And its decimals are 18. In the future, when NaturalDAO removes all elements obtained from outside markets and determines the ETH's price by using only ICPMM, NDAO will no longer has any relationship with US Dollar, but for sure it will be a stable coin forever.