Hi guys, I hope someone of binary developers are here and reading it. I am start to use binary API and I am wondered with this stupid logic OR mb a don't understand something? My situation: connect to binary and sent 5 same contracts in one second, don't receive response from binary and want to get https://developers.binary.com/api/#statement in order to bind the sent data and the result, but I can't do it because statement information don't have any custom field and i have 5 contracts and can't identify them. What can i do to do it? Is there some way to set custom field? And why statement response has "app_id" and don't has "req_id"? Asking about "req_id" because it can help me in my situation.