Corrects a lot that was entered wrong. Only the fields you send change. The instrument itself cannot be edited — a lot on the wrong stock or contract is a different holding, so delete it and add the right one. To record a sale, close the lot instead of editing its quantity down; editing it away loses the realized profit.

The corrected signed size. Negative is a short position or a written option.

The corrected price per share, always positive.

The corrected trade date, yyyy-MM-dd.

The corrected note. Send an empty string to clear it.

The corrected broker exchange rate: units of the portfolio's currency per 1 unit of the lot's currency.

Send true to remove the broker exchange rate, so the lot converts at the official rate on its trade date. Cannot be combined with fxRate.

True when this request repeated an add that had already landed, so nothing was created and the existing lot is returned. A client that retried a timed-out request reads this instead of discovering a second holding. The response is 200 rather than 201.