Understanding Position Limits
To prevent excessive market risk concentration and safeguard against potential market manipulation, OKX implements position limits for traders in specific contracts. These restrictions cap a user's position value relative to the total position value of the contract across the platform.
Scope
- Applicable to: Perpetual futures and expiry futures contracts.
Key Impacts
When a user’s combined open positions and pending orders (main + sub-accounts) hit or surpass either:
- The absolute USD limit per user, or
- The platform-wide position percentage threshold,
New opening orders in the affected contract will be rejected. Reduce-only orders remain unrestricted.
Detailed Position Limit Rules
If the USD value of same-direction (long/short) positions + orders ≥ Max of:
- Platform Position Value × Threshold %
- Per-User USD Limit
👉 Learn how position limits protect market integrity
Example:
- Threshold: 20%
- Per-User Limit: $250,000
| Scenario | Calculation | Effective Limit |
|---|---|---|
| Platform position = $500K | Max($500K × 20%, **$250K**) | $250K |
| Platform position = $20M | Max(**$20M** × 20%, $250K) | $4M |
Critical Notes
- Applies to: All crypto contracts (USDT/USDC/crypto-margined).
- Long/Short Separation: Limits are calculated separately for long and short positions.
- No Restriction on Closing Orders: Only opening new positions is blocked when limits are reached.
Parameters
| Parameter Name | Dimension | Description | Default Value* |
|---|---|---|---|
| Open Position % per User | Contract | Max % of platform positions a user can hold | 30% |
| Open Position Limit per User | Contract | Max USD value per user per contract | $250,000 |
Values may adjust dynamically based on market conditions.
FAQ
Why does OKX enforce position limits?
To mitigate systemic risks and prevent market dominance by a single entity, ensuring fair trading conditions.
Can I bypass position limits by using sub-accounts?
No. Limits apply to the combined positions of all linked main and sub-accounts.
Are closing orders affected?
No. Only new opening orders are restricted when limits are triggered.
👉 Explore OKX’s contract trading features
For expiry futures rules: OKX Futures Guide
For perpetual futures rules: OKX Perpetuals Guide