I would like an EA for MT4

Summary

I would like an EA for MT4, trading on a single currency pair. The basic over-view is:

Open at start of each trading day, with regard to the conditions set out below.

1          Load opening price of currency pair.

2          Create Chart Object Rectangle centered on opening price, with height = selected number of pips above, and depth = same below. Length = length of trading day.

3          Open both a pending buy and a pending sell trade at a distance of XX pips from the open price.

4          Set stop losses at YY pips, set take profits at ZZ pips (different methods sl & tp).

5          When the buy or sell is triggered, cancel the untriggered pending order.

6          Allow only one position to be open at any one time on any currency pair.

7          Initiate preceding_profits and trailing_stops after the trade reaches a predefined profit level.

This is an experimental EA, and is going to be used on MT4 Strategy Tester and then on  a demo account. I am not planning to run it on a real account just yet, and so I would like to be able to alter all the variables listed in the attached file (~55, but many are dependent). I have tried to use ‘useful’ names for the variables, but if I’ve used a reserved name, or one that may be inappropriate in some way, please feel free to change it. But don’t forget to let me know. After checking/optimizing the first version, there will probably be a need for some refinements and/or additions – so the EA needs to be easily extended and expandable. Ultimately it will run on up to 28 currency pairs, each with individual settings.

My operating system is: Mac OS 10.8.5, running Parallels Desktop 8 (www.parallels.com) and using Windows 7 Ultimate, Service Pack 1.

Cost is important, but more important is the accuracy and efficiency of the EA. There is no rush, so (if necessary) take your time and consider the best way to achieve my needs.