I am the founder and President of iPhorex, LLC. I am a full time Foreign Exchange (Forex / FX) currency trader. The need for mobility in trading the FX market rises because it is 24 X 7 (Sunday PM to Friday PM continuous) world wide spot futures market place. US $ 3.5 trillion is traded everyday. Unlike the equities market, the prices move every second! Hence, the need to view live price(s) action, charts and trading functionality anytime anywhere on the palm of your hand.
World wide Foreign Exchange (Forex / FX) traders. They could be located in about 80 coutries. But primarily in US, UK, Europe, Asia and S. America. Primary target of part time and full time "retail" traders. In other words, NOT traders on the Chicago Mercantile Exchange floor for example. Synonymous to E-Trade but it is for foreign exchange currencies.
The design should be simple - think like Apple products and designs. Should have probably two (maybe three) colors. Should demonstrate, accuracy, speed, trust, reliability and robustness.
For sample screen application features etc., please visit, http://www.fxcm.com and http://www.forex.com - download their software by signing up for a demo or practice account. It is free. Only PC versions are available.