2021-10-28 7:01:08[1635404468.0211] - new buy order: Array ( [contract] => DOT_USDT [price] => 41.2194 [size] => 1 [tif] => gtc ) Array ( [id] => 83131127379 [contract] => DOT_USDT [mkfr] => 0 [tkfr] => 0.0005 [tif] => gtc [is_reduce_only] => [create_time] => 1635404467.886 [finish_time] => 1635404467.886 [price] => 41.2194 [size] => 1 [refr] => 0 [left] => 0 [text] => api [fill_price] => 41.2107 [user] => 621225 [finish_as] => filled [status] => finished [is_liq] => [refu] => 0 [is_close] => [iceberg] => 0 ) 2021-10-28 10:01:03[1635415263.9975] - new buy order: Array ( [contract] => DOT_USDT [price] => 42.9983 [size] => -1 [tif] => gtc ) Array ( [id] => 83186500350 [contract] => DOT_USDT [mkfr] => 0 [tkfr] => 0.0005 [tif] => gtc [is_reduce_only] => [create_time] => 1635415263.861 [price] => 42.9983 [size] => -1 [refr] => 0 [left] => -1 [text] => api [fill_price] => 0 [user] => 621225 [status] => open [is_liq] => [refu] => 0 [is_close] => [iceberg] => 0 ) 2021-10-28 21:01:02[1635454862.6452] - new buy order: Array ( [contract] => DOT_USDT [price] => 42.4936 [size] => 0 [tif] => gtc ) Array ( [label] => INVALID_ARGUMENT [detail] => invalid size )