What is margin being held on my hedged order?

If margin is being held for hedged orders it could be due to one of the below reasons:

You are trading in different suffixes.
You have closed a part of the hedged order.
You are trading in different suffixes
Orders are considered completely hedged only if the instruments have matching suffixes. If you have a buy order in EUR/USD and sell order in EUR/USDm, full margin will be held for both orders.

You have closed a part of the hedged order
When two orders are hedged and you close one of them, the other order gets automatically unhedged. Thus, full margin is held for it.

Note: If closing a part of a hedged order during a high market volatility period (like before market closure), margin requirement for the unhedged order may be higher.