Adjust Position Size
Increase or reduce an open basket.
Scale an open basket up or down with POST /trade/:positionId/adjust (SDK: sdk.core.trade.adjust). Increasing adds to every leg in proportion; reducing trims them.
The endpoint acknowledges and the change lands over the WebSocket as position.updated. The exact sizing fields (percent or notional) are in @pear-protocol/types and the API Specification.