Create MS Excel Add In to Backtest Data

I need a MS Excel Add-In to backtest data (stock prices) and display results. I will provide the strategy conditions based on which the datas should be backtested. The spreadsheets will have the stock prices of securities, the add in work is to backtest (buy and sell) based on some simple conditions and give summarized results with % of winning trades, profit, profit/trade and few similar things. I will explain the logic clearly so you want have any problem in understanding. If you are good in excel coding or (VBE) then you can easily complete this project.