Invalid Percent Of Position Action

This message indicates that an invalid quantityType and action combination was provided in the request. The percent_of_position quantity type can only be used with the following actions: buy, sell, or exit. Any other action used in conjunction with percent_of_position will be considered invalid, and the request will not be processed.

Here is an example of a valid request using percent_of_position that will sell 50% of the open AAPL position:

{
    "ticker": "AAPL",
    "action": "sell",
    "quantityType": "percent_of_position",
    "quantity": 50
}