2021-11-19 0:01:03[1637280063.6394] - new buy order: Array
(
    [contract] => DOT_USDT
    [price] => 39.139
    [size] => 0
    [tif] => gtc
)
 Array
(
    [label] => INVALID_ARGUMENT
    [detail] => invalid size
)

2021-11-19 6:01:02[1637301662.9019] - new buy order: Array
(
    [contract] => DOT_USDT
    [price] => 39.7625
    [size] => 7
    [tif] => gtc
)
 Array
(
    [id] => 95448074674
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    [is_reduce_only] => 
    [create_time] => 1637301662.774
    [finish_time] => 1637301662.774
    [price] => 39.7625
    [size] => 7
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    [text] => api
    [fill_price] => 39.7617
    [user] => 621225
    [finish_as] => filled
    [status] => finished
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2021-11-19 14:01:03[1637330463.0597] - new buy order: Array
(
    [contract] => DOT_USDT
    [price] => 40.9938
    [size] => 0
    [tif] => gtc
)
 Array
(
    [label] => INVALID_ARGUMENT
    [detail] => invalid size
)