2021-10-25 15:01:02[1635174062.4902] - new sell order: Array
(
    [contract] => DOT_USDT
    [price] => 43.5473
    [size] => -34
    [tif] => gtc
)
 Array
(
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    [is_reduce_only] => 
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    [finish_time] => 1635174062.351
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)

2021-10-25 18:01:02[1635184862.3812] - new sell order: Array
(
    [contract] => DOT_USDT
    [price] => 44.2936
    [size] => -1
    [tif] => gtc
)
 Array
(
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)