Need an EA that trades by time period

I developed a spreadsheet to record the ½ hour. Price changes as of January 3, 2007. It separates the price changes for each period and then sums them.
Example: Between 7am and 7:30am CDT, GBP/USD rose 459 points.
Then I scan the total and try to find ½ hour. Putting these time periods together yields the greatest gain.
Example: Between 7am and 11:30am, GBP/USD increased by 1829 points.
Then I calculate the number of trades made during this period times the spread and check if I can make a profit.
Example: GBP/USD 188 trade has a spread of 4 pips = 752 pips.
1829-752=1077 points profit.
After 6 months of data crunching, I tracked my trades for the next month and used a spreadsheet to determine the stop loss limits needed to maximize profits.
Over the past 30 days I have traded GBP/USD, EUR/USD and EUR/JPY USD/JPY using this method and it showed a profit of 1600 pips.
I want to write an EA that allows me to enter entry and exit times and requires lot size and stop loss limits.