Here's the first pass results, equity chart from 9/06 to 6/24/09 (attached).
The steady profit trend on the graph was from 1/08 to 10/08 (peak equity was right before the Oct crash).
Some explanations and limitations:
1)This is run using 1 contract ES futures contract, $2.50/commission each way (what I pay)
2)Rules for the test:
*High and Low of the open bar (15 min on this test) set the breakout markers
*1 trade only per day
*Exit on the close
*Entry was by the first close above the open bar high, or below the open bar low
*No entries taken after 11AM
*No Stops or Profit targets used.
Numbers for the system, trading 1 contract:
Net profit - $20,585
Profit factor - 1.12
Percent profitable - 49%
Avg trade profit - $30
Max consecutive losing trades - 7
Max drawdown - $15k
Adjusted profit factor - 1.01
Because of the low net profit per trade, and low adjusted profit factor, the system would still need a lot more work.
Tradestation would not give me the 7 years of data I asked for yet (pending download) but hopefully this gives you a first crack at how it might fare.