I see 3 different trading symbols for commodity instrument with same expiry dates. I don't understand last 2 trading symbols. What is it for? Which 1 of them should I use for placing orders?
You need to place order on this monthly FUT contract.
COPPEROCT21DEC21FUT COPPEROCT21NOV21FUT
These two are spread contracts i.e spread over two months 21OCT21NOV, you can ignore these. We will remove such spread contracts from the instrument file.