# Open Interest

Open Interest (OI) is one of the key metrics used on Carbon to understand platform liquidity, available capacity, and trading demand. It reflects the real-time health of the trading system, how much capital is currently active, and how much is still available to power new trades.

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### <mark style="color:$info;">What is Open Interest?</mark>

**Definition**\
Open Interest (OI) on Carbon represents the total value of live perpetual contracts that are currently open and unsettled. It shows the amount of notional exposure that the Carbon Solver network is actively supporting at any given time.

**How It’s Calculated**\
OI is determined by the collateral solvers have deployed on-chain to facilitate trading. Each solver has its own OI cap, depending on how much liquidity solvers have provisioned. With the Carbon Solver (CLP), OI is set to increase tremendously.

We use the following formula:

**OI Ratio = Current OI / Available OI**

As this ratio increases, it signals greater trading activity; but also less headroom for new positions unless additional solver capital is allocated or existing trades are closed.

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### <mark style="color:$info;">Key Characteristics of Carbon’s OI Model</mark>

* **Chain-Specific**: OI is tracked separately per chain. Solvers allocate collateral where trading demand is highest.
* **Dynamic & Uncapped**: There are no hard-coded limits set by the protocol. All limits are dynamic and based on real liquidity from solvers.
* **Market-Responsive**: As OI fills up, new trading may temporarily slow down, encouraging natural rebalancing or new solver capital to enter.

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### <mark style="color:$info;">Why OI Matters</mark>

**1. Liquidity Signal**\
Higher OI means more active contracts and deeper liquidity. It’s a live reflection of how much the system is being used.

**2. Sentiment Gauge**\
Rising OI often means new money is flowing in, a sign of growing interest or trend conviction. Falling OI might suggest profit-taking or risk-off behavior.

**3. Execution Impact**\
When OI is nearing capacity, traders may see fewer quotes or temporarily limited sizing. Monitoring the OI ratio helps traders plan entries and exits more effectively.

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### <mark style="color:$info;">Example Scenarios</mark>

**Example 1: High OI Indicates Market Momentum**\
A trader sees OI rapidly increasing on BTC/USDC. This could signal strong inflows and growing trend conviction. They decide to long BTC with confidence the market has volume behind it.

**Example 2: Declining OI Suggests Caution**\
A trader notices that ETH/USDC OI has been dropping for several days. Fewer open positions may point to cooling interest or profit-taking. The trader tightens stops and reduces exposure.

**Example 3: OI and Volume Divergence**\
LTC/USDC OI is still rising, but daily trading volume is flat or dropping. This divergence suggests traders are holding positions but not entering aggressively. The trader decides to wait for a breakout before taking a position.

> These examples are for educational purposes only. None of this is financial advice.

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### <mark style="color:$info;">Strategy & Risk Management Tips</mark>

* **Monitor OI Ratio**: A high ratio means the system is heavily utilized. Consider how that may affect execution.
* **Understand Collateral Dynamics**: OI is collateral-backed. Solvers must be capitalized on each chain, if demand spikes, additional liquidity may take time to arrive.
* **Anticipate Congestion**: If OI nears capacity, opening new large positions may become harder. Use this knowledge when managing entries, exits, or scaling into trades.

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### <mark style="color:$info;">In Summary</mark>

Carbon's Open Interest model is designed to reflect real-time trading activity and capacity. Because liquidity is sourced from live solver collateral, OI isn't just a number, it’s a real signal of how much firepower the system currently has.

**Watch the OI ratio.** Trade accordingly.

And remember: the more active the Carbon ecosystem becomes, the deeper and more liquid the system gets.


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