CP API: Trailing Stop | Interactive Brokers

Trail Offset. Required.
One of the following approaches to Trail Offset specification must be used with the order ticket.

Absolute Offset: "trailingType": "amt", "trailingAmt": {{currency}}
Relative Offset: "trailingType": "%", "trailingAmt": {{number 0 to 100}}
Note that you must pass a literal % character as the value of the trailingType field in order to use a percentage trailingAmt value.

Stop Price: "price"

In the example to the right, we have outlined two Trailing Stop orders with explicit Stop Prices via the price field.
In the first order, we supply a relative offset of 2% using "trailingType": "%" and "trailingAmt": 2.
In the second order, we supply an absolute offset of 3 units of currency using "trailingType": "amt" and "trailingAmt": 3.

JSON

{
  "orderType": "TRAIL",
  "price": 100,
  "trailingAmt": 2,
  "trailingType": "%"
}