2021-11-21 9:01:04[1637485264.3065] - new sell order: Array
(
    [contract] => DOT_USDT
    [price] => 41.2449
    [size] => -0
    [tif] => gtc
)
 Array
(
    [label] => INVALID_ARGUMENT
    [detail] => invalid size
)

2021-11-21 21:01:03[1637528463.6302] - new sell order: Array
(
    [contract] => DOT_USDT
    [price] => 41.9461
    [size] => -0
    [tif] => gtc
)
 Array
(
    [label] => INVALID_ARGUMENT
    [detail] => invalid size
)