Does MarketDelta really work?
Depends on your methodology and what you are using MD to provide.
I use it successfully. I primarily daytrade. However, I sometimes trade options and even an occasional swing trade.
I also know those who only use MD or MP as a "standalone" system -- meaning trading just from the information they obtain watching MP or MD -- no other indicators or even traditional charts.
I use MD to tell me if the volume supports my entry. Not just total volume but whether the volume is aggressively trading at the bid or the ask. You can set the MD to also give you the profile info.
Investor IRT is the original programmer of the software. The important distinction is the visual presentation. Dr. Linn recognized that, indeed, Market Delta had an Original and trademarked -- as well as patent pending change to market profile. So rather than get into a legal battle the two companies work separately but Investor RT does not provide a "Market Footprint".
It is the Market Footprint that I use and find so valuable. MD is not cheap -- costs about 160.00 per month and then you also need a good data feed which is an additional cost. So it must work or you would not continue to pay for it. (you can try it for free for one month).
If you need more info as to specifically how i use it then please PM me and i will discuss how i use it profitably.