Hi Jeremy, "orderRef" is an optional parameter attached to an order object.
It allows you to identify and manage your orders easily.
Just like the pair trading example in TechDoc, suppose you opened multiple trading pairs at the same time. eg.
order #1: buy AAA
order #2: sell BBB
order #3: buy CCC
order #4: sell DDD
...
Let's say, order #1 and #2 are of the same pair; and order #3 and #4 are another pair.
By defining our own pair_id (eg. order #1 and #2 use orderRef=p1; order #3 and #4 use orderRef=p2), we can then identify different pairs easily for subsequent order close condition checking.