# Parameters

**APIs:** When in doubt, follow the data [here](https://app.swaggerhub.com/apis-docs/solendprotocol/API/1.0.1#/Reserves/get_v1_reserves_).\
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This config also includes oracles used, their addresses, refresh rates, and is better for integration.

For non devs, parameters are available in app by clicking any asset then clicking "More parameters"

### Parameters:

Each reserve in Main or Isolated pool has these parameters that balance the supply & demand of the pool or governs the size of the loan you can take out (based on the quality and liquidity of the collateral asset). 

The critical thing to remember is the borrow APR changes based on utilization. Utilization is Tokens Borrowed / Tokens Supplied. At 0% utilization, there is excess supply and no demand, while at 100% there is excess demand but no supply. Details are in [Protocol Math & Fees](https://docs.solend.fi/protocol/fees). 

| Parameter                | Value                                                         |
| ------------------------ | ------------------------------------------------------------- |
| Optimal utilization rate | Utilization where borrow APR starts to increase exponentially |
| Loan to value ratio      | Borrow X% against your collateral                             |
| Liquidation penalty      | % of your liquidated collateral to incentivize liquidators    |
| Liquidation threshold    | Account health that will trigger a liquidation                |
| Min borrow APR           | Borrow APR when Utilization = 0%                              |
| Optimal borrow APR       | Borrow APR when at optimal utilization                        |
| Max borrow APR           | Borrow APR when utilization = 100%                            |
| Borrow fee               | Origination fee Solend keeps when you borrow                  |
| Flash loan fee           | Origination fee Solend keeps when you borrow via flash loan   |
| Host fee percentage      | % of borrow fee kept by referral, UI or pool creator          |
| Deposit limit            | The cap of tokens that can be deposited into the pool         |
| Borrow limit             | The cap of tokens that can be borrowed into the pool          |

## Recovery Mode:

Recovery Mode is triggered during times of heightened volatility or network congestion. During Recovery Mode, a council of contributors can make parameter changes with greater flexibility to minimize bad debt and damage to Solend and its users. 

\
**Note:** These changes might lead to liquidations occurring, done so without liquidation penalty in market turmoil. These changes are made to reduce bad debt for Solend as a whole, and may lead to user positions being forced closed by liquidators without penalty. <br>

When Recovery Mode triggers, announcements will be made on [Twitter](https://twitter.com/solendprotocol) and in [Solend's Discord. ](https://discord.gg/solend)A Banner will also be added on the primary Solend UI at:<https://solend.fi>.&#x20;


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