OK, here is my first back test.
Data set: S&P 500 E-Mini Future (symbol ES), 5147 5-minute OHLC bars
Data set dates: 09/07/2006 to 12/06/2006 (3 months when Dec 2006 contract was the front month contact)
Start of trading session: 10:00 EST every business day (original poster specified not trading the first half hour)
End of trading session: 15:55 EST every business day
Overnight position carry: Not allowed (open positions are closed at the end of the day)
Indicator used: MACD(12, 26, 9). That is, 12 5-minute bars for a fast EMA, 26 5-minute bars for a slow EMA, and 9 5-minute bars for an EMA of MACD itself (which is the so called "signal line").
Trading costs assumptions: 0.25 bid/ask spread (usual for ES), 0 slippage (very optimistic), $2.40 commission per side.
Long Entry Rule: When MACD is above zero
and MACD is above its signal line.
Exit from Long Entry: When
either MACD is below zero or MACD is below its signal line.
Short Entry Rule: When MACD is below zero
and MACD is below its signal line.
Exit from Short Entry: When
either MACD is above zero or MACD is above its signal line.
Results: System made 572 trades, for a loss of $6500 per contract over the test period.
Below is a chart for one of the better days (although even for that day the system was barely profitable). The circled letters on the charts indicate at which time and price a position was taken: "S" for short, "L" for long, and "F" for flat.
Now, I am not sure if the rules that I identified are what the original poster had in mind. You'd also note that instead of the 2-min ER2 chart, I used the 5-minute ES chart. I'll retest the 2-min ER2 tomorrow. Let me know if I missed anything else.