AFL Programmer for Trading System Backtest Script, Amibroker

I require someone experienced with programming in Amibroker Formula Language (AFL) to code a backtest script of a simple trading system (trading Stocks) for use within the Amibroker software platform. - The rules of the system will be expressed in plain English - Backtest will be at a portfolio level using historical data - The programmer should be able to code using the Custom backtest procedure - The Buy/Sell rules are simple but I would require advanced/complex level of Portfolio Sizing and Handling variations There will also be further on-going work in refining the trading system once it has been coded and this will consist of making minor modifications to the code based on the results of the backtest (I am willing to pay a reasonable price for the modifications). There will also be future work coding additional trading systems over the next 6 months. I would anticipate the programming time required to be 1-2 hours initially for an experienced programmer and I am willing to pay a reasonable rate for the programming.