Arbitrage expert adviser

I bought an ea from a vendor for $800 now it does not work and he has now disappeared so cannot offer any support for his ea. I have the EA in MQL form now. The basics of the EA is to compare quotes from Deutsche Bank via global trade-station demo platform. There is then a program that gets the two platforms to communicate the quotes between MT4 and the Trade station. the trades are executed on the MT4 platform when the quotes are a certain distance apart. This ea has worked live and profitable on two different brokers. What you are quoting on is being able to show that you can get it to work on a live broker feed I will provide a small live account that you must first hook up the ea up to and show that it trades. There will not be any 50% milestones etc 100% on delivery only. For an experienced coder it will not be too hard however i do not believe the problem is based in the MQL coding but rather in the program that communicates. The whole package will be provided to the winner of the bid. Please keep in mind when quoting that we are not making an EA from a conceptualized idea but rather just fixing an existing one that was working and now is not. I have done several projects through freelancer and I always pay in full on delivery of the project. Looking forward to the bidding process and good luck to the eventual winner.