Looks like Sterling Trading bought Live Vol X and rebranded it as Sterling Vol Trader. See https://www.sterlingtradingtech.com/sterling-voltrader/
Anyone use it? What are the fees like? All I do is manage my portfolio option greeks, analyze IVs/skews and look at option order flow so this seems to hit the marks, but not sure if worth the price over stock Think or Swim, which does a decent job.