The original question of this thread was about 3 Day Bars and which platform is capable of doing it. I answered Sierra can do that and provided a link for the demo so the OP can test it. That is all. If this alienated you, I apologize. I am still not sure what I did wrong, but I don't want to offend anyone. Can we PLEASE end it on this good note?
With TradeStation you can make artificial 3 day bars through coding but otherwise the platform itself does not allow for bars greater than a day equaling 1440 minutes (besides the usual weekly/monthly). Don't know about Multi-Charts.
TradeStation, and I suspect other platforms, allows any number of minutes for bars (1, 30, 60, 479, anything). Three days is 1170 minutes, so set it for that, and you have 3-day bars.
As I said just before your post TradeStation does not. It limits minute charts to 1440 max or 1 complete 24 hour time cycle.
PRICE IS THE SAME ON ALL CHARTS! The only real chart is the 1-tick chart. All of the other charts are data compression. There are no magic chart periods. Draw a horizontal line on any chart. Either price stays/goes above the line or it stays/goes below the line. TRADING IS SIMPLE. Why complicate it?
I know Gann used 3 day charts (for stocks I believe) - in addition to other time frames. His trading was pre-automation. I think his rational was that it was 1/2 a week (there were 6 TD for commodities then - I believe). Yes you can used your IB data feed for NT charting - which is what I do. The free version will do this. (If you want to enter your trades directly from NT you need the paid version but if you are plotting 3 day you don't need that).
TRO if one trades on a 1 tick chart I suppose. If one trades on a daily basis why would a 1 tick chart be applicable?