# Alcor Price Oracle vs DelphiOracle

| **Aspect**                              | **Alcor Price Oracle**                                                                                                                  | **DelphiOracle**                                               |
| --------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------- |
| Data Source                             | Extracts data directly from Alcor Swap decentralized exchange.                                                                          | Aggregated from multiple centralized exchanges                 |
| Price Calculation Method                | Time-weighted average price                                                                                                             | Average of prices fetched from exchanges                       |
| Price Availability                      | Provides prices by timestamp and unlimited historical data availability.                                                                | Provides only the last price                                   |
| Freshness/Accuracy                      | May not reflect the current spot price during high volatility                                                                           | Provides current spot price but may lag during high volatility |
| Manipulation Susceptibility             | There is currently not enough economic incentive to manipulate TWAP. refer [**here**](https://blog.uniswap.org/uniswap-v3-oracles)**.** | Very hard to manipulate                                        |
| Data Storage                            | Historical data is stored as an array of observations                                                                                   | Only stores recent historical data                             |
| RAM Cost for Extended Data Availability | Requires RAM payment to extend data availability period                                                                                 | N/A                                                            |
| Token Pairs                             | Provides for all token pairs available and trading on Alcor Swap                                                                        | Provides only some pairs like WAX/USD, BTC/USD, ETH/USD        |


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