2021-10-13 6:01:04[1634104864.0547] - new buy order: Array
(
    [contract] => DOT_USDT
    [price] => 33.8289
    [size] => 66
    [tif] => gtc
)
 Array
(
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    [tif] => gtc
    [is_reduce_only] => 
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)

2021-10-13 20:01:02[1634155262.5885] - new buy order: Array
(
    [contract] => DOT_USDT
    [price] => 42.3009
    [size] => 17
    [tif] => gtc
)
 Array
(
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)