OrderFlowPro

I have used both and can say unequivocally that Sierra is far superior to Ninja. Ninja caters to the brokers and third party suppliers where Sierra's concerns are the users. The proof is Sierra's response and action to user problems and Ninja's lack of action. Also, there are many realtime bugs in Ninja. The lack of ability to chart historical bid ask data, a major issue to deciphering price momentum. Sierra is much easier to customize and its Spreadsheet feature and functions make Ninja look like an amateur traders toy rather than a serious professional's program. Just look at the lack of chart scaling flexibility in Ninja, as compared to Sierra(a basic feature needed to adjust to individual needs) as Ninja's "our way or the highway" approach to user's individual usage and needs. Read Ninja's support forum responses to user problems compared to Sierra's and you will see their obvious limitations and lack of concern for the trader.

After studying and using MP for years and using all the software out there, I can say without reservation the best is Sierra Charts. Not only is it the "best bang for the buck" but it allows you to create your own indicators with just a knowledge of Excel. The number of advantages it offers, at times seems endless. There is a learning curve but for a serious trader it is well worth the time spent learning it. I have no affiliation with them other than a very satisfied customer.