This is the only thing that frustrates me about IG. Great platform and options, but I seem to missing out on most if not all opportunities I discovery through my DD due to this.
Can sometimes catch them if I identify them in premarket before it seem IG has, but shortly after market open it will be put on this "HOLD".
Makes me wonder if IG has a limit on the % difference a stock can make in premarket before they lock it down to being none tradable.