theres only one way to find out and its to do the statistical studies yourself. I suggest you take stats on the following
- how much time between the 1st and 2nd hi/lo that you link.
-how many high and lows forms your trendline (to verify if more highs and lows means a stronger trendline''
the total ''time'' of the trendline. exemple if your trendline starts at the 10:00 am high and ends at 13:00pm, you have a 3 hours long trendline.
-the slope of the trendline
do that and youll have a definite answer to whats good and whats not.
i assume that you want to play trendline breaks as entries. do the work and youll know if a 4 point trendline that spans over 4 hours and is sloped downwards is statistically better than a 2 points trendline that spans over 1 hours and is horizontal.