Quote from man:
I could not prove on daily data since 1984 that days following narrow range or iniside bars or combinations of the two have unusual trendiness, range or direction. it sounds like unproved rumor to me - or i did not ge it right.
peace
Most of those who trade this method pre select the stocks using a trend indicator like relative strength or MA so if you do historical analysis using that filter the results might be different.