2021-11-29 15:01:03[1638198063.8229] - new sell order: Array
(
    [contract] => DOT_USDT
    [price] => 35.882
    [size] => -0
    [tif] => gtc
)
 Array
(
    [label] => INVALID_ARGUMENT
    [detail] => invalid size
)

2021-11-29 23:01:04[1638226864.1194] - new sell order: Array
(
    [contract] => DOT_USDT
    [price] => 37.2479
    [size] => -0
    [tif] => gtc
)
 Array
(
    [label] => INVALID_ARGUMENT
    [detail] => invalid size
)