Ohhh yesss! In fact the L2 was already working better than many other third party IB-interfacing API. NSDQ was showing depth - it was just subjectively slower than on TWS. Now if all the other books could could, even if only ARCA, it'd be the best TWS alternative for equities as far as i am concerned. I'm testing out pretty much all available datafeeds and while sure, IQfeed is cliquety fast on the L2, it's missing information. What puzzle me is that on TWS, using the booktrader/dom, the data seems to come in fast and not so much in IB's market depth or market depth trader. Then there is their time and sales and their chart that are clunkier than Tradingview using a web browser. Oh well. You have a new subscriber; i'll test inside and out the new feature! Thanks lots!