... in the next out -of- sample quarter.Testing continues like this all the way through the database. The net performance of allout -of- sample tests is summarized. Overall, the results should be profitable ... calculate the 3x5ATR for potential resistance, add the 5ATR to the three-day movingaverage of the lows. To calculate the 3x5ATR for support, subtract the 5ATR from the three-day average of the highs.An ... am] S&P day-trading systems:What works andwhat doesn't Of all the day-trading systems I've tested over the years, 90% of them trade the S&P 500. This is the market of choice...