2021-11-22 2:01:03[1637546463.0153] - new sell order: Array
(
    [contract] => DOT_USDT
    [price] => 41.1262
    [size] => -6
    [tif] => gtc
)
 Array
(
    [id] => 96938440389
    [contract] => DOT_USDT
    [mkfr] => 0
    [tkfr] => 0.0005
    [tif] => gtc
    [is_reduce_only] => 
    [create_time] => 1637546462.891
    [finish_time] => 1637546462.891
    [price] => 41.1262
    [size] => -6
    [refr] => 0
    [left] => 0
    [text] => api
    [fill_price] => 41.1311
    [user] => 621225
    [finish_as] => filled
    [status] => finished
    [is_liq] => 
    [refu] => 0
    [is_close] => 
    [iceberg] => 0
)

2021-11-22 5:01:03[1637557263.4012] - new sell order: Array
(
    [contract] => DOT_USDT
    [price] => 39.8679
    [size] => -0
    [tif] => gtc
)
 Array
(
    [label] => INVALID_ARGUMENT
    [detail] => invalid size
)

2021-11-22 16:01:03[1637596863.0711] - new sell order: Array
(
    [contract] => DOT_USDT
    [price] => 40.1543
    [size] => -0
    [tif] => gtc
)
 Array
(
    [label] => INVALID_ARGUMENT
    [detail] => invalid size
)