How to Configure STP

Option 1 — Global setting:

1. Log in and go to the Perp trading page

2. Click the Settings icon in the top-right corner

1. Under the "Trading" section, find Self-Trade Prevention and click to open

1. Select your preferred strategy in the pop-up and click Confirm

Changes take effect immediately after saving. Portions already filled are not affected — the selected STP strategy applies only to the remaining unfilled quantity.

Option 2 — API STP Strategy:

• Add the stpMode parameter to the POST /fapi/v3/order endpoint

• API-level settings take priority over the global setting, but only apply to that specific order

Specifying STP Strategy via API

Use the optional parameter stpMode in POST /fapi/v3/order to set a strategy for an individual order:

stpMode: "EXPIRE_MAKER" // Cancel Maker Only stpMode: "EXPIRE_TAKER" // Cancel Taker Only stpMode: "EXPIRE_BOTH" // Cancel Both

• If omitted, the account's global STP setting (EXPIRE_MAKER) is used automatically

• API-specified strategies take priority over the global setting, and apply to that order only

Example: Cancel Maker Only in Action

A user runs two strategies simultaneously on the BTCUSDT perpetual contract, with STP set to Cancel Maker Only.

Strategy A places a limit sell order on the order book: sell 0.1 BTC at 69,000 USDT (maker)

Strategy B then places a market buy order: buy 0.1 BTC at market — the best available ask happens to be 69,000 USDT (Strategy A's order)

The matching engine detects that both orders belong to the same account and triggers STP:

Maker sell order (69,000 limit) → Immediately cancelled, status: EXPIRE Taker buy order (market) → Continues execution, matches against the next ask on the book

The taker order ultimately fills at 69,001 USDT or higher against another seller, and the strategy continues running as intended.