Much of what Jerry Medved can do or say with respect to him getting back into anything having to do with charting software would depend on the terms of his contracts with TDA. Many anti-compete terms of buy/sell contracts have a time limit of 3 to 5 years on the seller.
Sierra chart does not meet my needs and requirements. I used RealTick for 10 years and could use it again but it falls short of Quote Tracker.
If QT does go away, multicharts now has a free discretionary version they are working on. Not pumping it or anything, just an option that is out there for free and it actually lets you trade off the charts or dom if you use IB, unlike the ninja free version (which I also like). It is still in alpha and has some kinks, but they are pretty good about working them out.
Working fine here using Ameritrade for backfill; your backfill provider must offer index backfill in order for this to work.