Are you talking about a Forex trading platform? If so, I recommend Metatrader 4. You can download it for free and it is a really good one. It helps you with technical analysis, among other features.

http://www.metatrader4.com

If you are talking about an Expert Advisor, check Forex autopilot turbo:

http://www.forexapt.com
References :
http://www.metatrader4.com

http://www.forexapt.com

http://make-money-with-forex.org

Here you’ll find the best software that will increase your forex trading profit
References :