GTC limit order on IB platform cannot execute outside RTH?

[helpme_please]

I am using Interactive Brokers TWS platform.

I have 1 ES futures contract. I want to place a profit-target GTC sell limit on this ES contract. However, the option "allow order to be filled outside of regular trading hours" is disabled for limit orders. Does this mean ES futures contract limit orders cannot be filled outside of RTH? This sounds like a big risk if ES gaps down on opening of RTH.

I will answer my own question. I have confirmed with Interactive Brokers support staff that GTC limit orders can be filled outside of RTH.

 

[helpme_please]

Interactive Brokers has been a good platform for futures so far, particularly when it comes to pricing. However, it is a complex platform given the flexibility it offers to clients, so a good practice would be to try out on a paper trading account, make some losses in fake money, get familiarised with the platform before getting into real business with real money.