# Pricing Methods
Source: https://docs.chain.link/data-streams/concepts/pricing-methods

> For the complete documentation index, see [llms.txt](/llms.txt).

Many Data Streams aggregate prices from multiple independent providers. The pages below cover the standard crypto bid/ask construction and the specialized or derived methods used by specific stream families. They are not an exhaustive list of every stream; they explain the methods that differ from default aggregation.

| Method                                                                                    | Type                    | How the price is built                                                         | Where it applies                     |
| :---------------------------------------------------------------------------------------- | :---------------------- | :----------------------------------------------------------------------------- | :----------------------------------- |
| [TWAP Streams](/data-streams/concepts/twap-streams)                                       | Time-weighted average   | Average price over a rolling window, updated with each report                  | 24/7 TWAP streams                    |
| [Liquidity-Weighted Bid and Ask prices](/data-streams/concepts/liquidity-weighted-prices) | Standard crypto pricing | Bid, ask, and mid weighted by order-book depth                                 | Crypto streams                       |
| [DEX State Price Streams](/data-streams/concepts/dex-state-price-streams)                 | Specialized             | Aggregated from DEX pool state for assets whose liquidity is primarily onchain | DEX-dominant or DEX-exclusive assets |
| [Crypto Top-of-Book Streams](/data-streams/concepts/crypto-top-of-book-and-mark-price)    | Specialized             | Best bid and ask from a single exchange's order book                           | Perpetual futures markets            |
| [Calculated Streams](/data-streams/concepts/calculated-streams)                           | Derived                 | Values computed from multiple inputs using predefined formulas                 | Streams whose values are derived     |

For default data sourcing by asset class, see [Data Sources](/data-streams/data-sources). For the streams available in each category, see [Streams & Schemas](/data-streams/reference/report-schema-overview).