It's much more simpler than what your looking for. The only issue is the infrastructure aspect of it and hiring people to monitor the proper functioning of the system.
BTW, why do you consider 53% to be bad? Is this some kind of r/r of 1:1?
Because you can't trade 5 minute expirations on any other regulated exchange in the U.S. It's once a week at best. You're right about the notional and they certainly leave a lot to be desired, but they do have market makers that quote a continuous market that's at least in the tens of thousands in size, and I haven't seen them widen spreads even when I hit them repeatedly for their full offer size. The worst they do is wait 3 or 4 minutes to reload that side of the market. I really do wish they had more volume, and they generally run a shoddy operation with buggy execution software that ironically can't handle high volume or big movement days. However they're all you've got if you want short term expirations.Nadex is a joke. They probably do less than $500K notional, daily. Digital is simply a discrete vertical, and now is that going to help a guy trading in 5-minute holds?
Because you can't trade 5 minute expirations on any other regulated exchange in the U.S. It's once a week at best. You're right about the notional and they certainly leave a lot to be desired, but they do have market makers that quote a continuous market that's at least in the tens of thousands in size, and I haven't seen them widen spreads even when I hit them repeatedly for their full offer size. The worst they do is wait 3 or 4 minutes to reload that side of the market. I really do wish they had more volume, and they generally run a shoddy operation with buggy execution software that ironically can't handle high volume or big movement days. However they're all you've got if you want short term expirations.