the OP did not specify anything about writing systems... for all we know, just wants historical data for discretionary trades backward research Ninja charts are excellent on volume-bar settings... if you know how to trade it's simple and if you dont it's impossible. Has nothing to do with the frog-hair splitting on charts data to the nnnnnnnnnth degrees.
Accuracy is accuracy. Those two vendors are the only ones that do it correctly. A tradestation volume chart is crap. Pure crap, and the other datasets I've seen show E-signal and Barchart to be significantly more accurate because other vendors disregard the true sequence of the volume, where if multiple contracts were filled other vendors will not segregate the trade marking the breakpoint, whereas E-signal and Barchart do. It makes a huge difference, and if someone is going to use volume charts, it must be from e-signal which is what I use but you can also use barchart. I also think multicharts is by far a superior platform to tradestation and nt.
If it's not e-signal or barchart, you can't expect to get better results using volume charts from any other vendor. Attention to detail is important, but no matter how much you pay attention to detail, it's useless if you don't even do your due dilligence about data vendors, and this is it. BTW, it's obvious he wants the data for strategy backtesting.
You are repeating yourself. What does it mean. Show an example. Esignal is a data vendor. So you can use their tick data to show volume bars in whatever software. Or do you mean Esignal chart software? What do you mean by accurate? Otherwise your claim makes no sense.
Most software vendors offer Esignal or Barchart to get data from. I don't use TS or NT. And MC is too slow. Still show me/us an example about accuracy.
Kinetick, Zen-Fire, CQG are all unfiltered feeds that record and server historical tick volume in the correct order received by the exchange thus, accurate historical data that would then create volume bars.
Quote regarding NT's so caleld CQG feed. Quote regarding Zenfire and http://www.mypivots.com/board/topic/6392/2/ninja-trader-with-amp-brokerage