2021-12-22 14:01:02[1640181662.9874] - new buy order: Array
(
    [contract] => DOT_USDT
    [price] => 26.5286
    [size] => 27
    [tif] => gtc
)
 Array
(
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    [is_reduce_only] => 
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2021-12-22 16:01:03[1640188863.6986] - new buy order: Array
(
    [contract] => DOT_USDT
    [price] => 27.2889
    [size] => -1
    [tif] => gtc
)
 Array
(
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