i use default timeout value, 1 sec. ping to poloniex.com <2ms. place some sell order. sleep time between order places is 2 sec. coach set to 1 call/1sec. some time i found sell order duplicates in order list.

{'orderNumber': '76671857444', 'type': 'sell', 'total': '0.00231183', 'date': '2017-05-06 08:39:18', 'margin': 0, 'amount': '0.10391764', 'startingAmount': '0.10391764', 'rate': '0.02224676'}, {'orderNumber': '76671858443', 'type': 'sell', 'total': '0.00231183', 'date': '2017-05-06 08:39:18', 'margin': 0, 'amount': '0.10391764', 'startingAmount': '0.10391764', 'rate': '0.02224676'}

conclusion (for me) at this time for poloniex 1 second is not perfect timeout value!