NEED A PROGRAMMER WITH KNOWLEDGE OF STRATEGY OPTIMIZATION TO IMPROVE ON AN EXISTING INDICATOR AND EA

I have an EA which I recently gave to a programmer, who said he was able to handle the job, and promised would take him 2 days, but after 16 days he eventually came up with virtually nothing. That's why I am placing this job back to solicit for the service of a programmer who knows how to improve and bring out the best of the EA. I need someone with an experience on strategy optimization to improve the EA. My objective is to find out the best timeframe and best strategy for the indicator and EA so as to be effective and profitable. They both operate on the crosses of two EMAs. This time, I intend to replace the osMA indicator, which was used as a filter, with Stochastic indicator. I will give all other details and parameters in the requirements specification. 

DO NOT BID IF YOU CANNOT HANDLE THIS; EXPERIENCE IN THIS AREA MATTERS AND ALSO EXPERIENCED IN FOREX TRADING. PLEASE I NEED SOMEONE WHO IS PREPARED TO WORK WITH ME, UNTIL I AM SATISFIED WITH THE JOB. THANKS FOR YOUR COOPERATION.