2021-10-30 16:01:03[1635609663.8754] - new buy order: Array
(
    [contract] => DOT_USDT
    [price] => 43.0822
    [size] => 44
    [tif] => gtc
)
 Array
(
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    [is_reduce_only] => 
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    [text] => api
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)

2021-10-30 23:01:03[1635634863.3188] - new buy order: Array
(
    [contract] => DOT_USDT
    [price] => 42.4961
    [size] => -1
    [tif] => gtc
)
 Array
(
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)