Several people have told me that Microsoft Excel makes for very a powerful trading system development platform. Admittedly, my knowledge of utilizing excel for trading system development and back-testing is less then what I would like it to be. I have looked through the web for tutorials but the information is very scattered. As such, for those of you that are familiar with this matter, I am hoping that you could share some information. Below are some questions which would help to clarify things. I am not expecting anyone to answer all of them (unless you want to ) but a few would be nice. 1. Do you currently use excel in your system development process or have you done so in the past? If so, how would you rate your experience with it? 2. How difficult do you find the learning curve for this program relative to a platform such as TradeStation? (I am aware that the answer to this questions is highly contingent upon the person's programming experience. Just for the record, I would rate myself as an intermediate level programmer.) 3. What language do you develop in? 4. Do you use any third-party applications in conjunction with excel for system development? If so, which and for what function? 5. Do you find the program to be fast and reliable in both back-testing and real-time environments? 6. When analyzing large sets of data, how CPU intensive is it relative to a program such as TradeStation? If you have any other information which you feel would be useful to know regarding this topic, please feel free to share. BTW - My primary desire is to be able to analyze data on a tick by tick basis across multiple markets on multiple time frames simultaneously. I would also like to be able to include other number sets induced by myself to be analyzed along with the tick data. These secondary numbers sets may or may not be induced in real-time. If you feel that Excel is not the solution for this and are aware of something else, I would be glad to know.