Quote from bitrend:
If we eliminate the fake trend that was created by a manipulation, a few players who artificially created the trend and this kind of trend won't last long since it wasn't a real trend.
For the intrinsic trend, if there is no crowd then there is no trend. The crowd creates the trend or the crowd is the trend. To prove that we need to divide the crowd into two groups, one group for bearish and another group for bullish. If the two groups are equal, meaning that there are enough people that think a stock will go up and enough that think the exact opposite, then there's no trend since the resultant force is zero, simple physical laws. If one group is stronger than another then a trend is on its way.
So The trend is your friend means boarding like the crowd or with the crowd but exiting unlike the crowd.