# Collecting Liquidity Data

The SDK includes several functions that simplify gathering liquidity-depth data.

#### To Get Liquidity Depth Data

1. Initialize the SDK with the [Constructor](/developer-guides/carbon-defi-sdk/sdk-functions/constructor.md).
2. Sync strategy data by calling [startDataSync](/developer-guides/carbon-defi-sdk/sdk-functions/startdatasync.md).
3. Call the relevant liquidity data function:
   * [getRateLiquidityDepthByPair](/developer-guides/carbon-defi-sdk/sdk-functions/getrateliquiditydepthbypair.md)
   * [getMinRateByPair](/developer-guides/carbon-defi-sdk/sdk-functions/getminratebypair.md)
   * [getMaxRateByPair](/developer-guides/carbon-defi-sdk/sdk-functions/getmaxratebypair.md)


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