Modify Isolated Position Margin

Type: TRADE

Weight: 1

POST /fapi/v1/positionMargin

Status: Not yet implemented (空缺).

The FAPI surface is cross-margin only. Position collateral can be adjusted on the native API with a JWT: POST /api/v1/positions/{position_id}/collateral/add and POST /api/v1/positions/{position_id}/collateral/remove.