While doing some ATR calculations I noticed that the daily ATR(14) divided by the Close for some of the stocks we're following is quite close to the standard 5% trailing stop. Consider these values:
TIE, close 59.62, atr 2.77 ==> 4.7%
NGPS, close 31.46, atr 1.32 ==> 4.2%
NTRI, close 40.05...