You are absolutely correct.
Can you summarize all the rules you know about Trendlines.
I am working on it so that we have a comprehensive knowledge about Trendlines.
Even I am learning abt TL's, but here are some of my opinions of TL
a) A Trendline (TL) is drawn connecting 2 pivot lows with a higher pivot in between in an uptrend & vice--versa for downtrend. Very important to draw it correctly as sometimes we find that the prices have close below the TL & after 2-3 bars the prices rise up again & continue their journey. More often, the cause is we drew the TL incorrectly.
b) The more touches on the TL then more harder it is to break.
c) A TL is considered to be invalid only if the price closes below/above it in the timeframe on which it is drawn. Eg. Daily TL is considered broken only if the price closes above/below it at EOD.
d) Break of TL does not mean it is reversal, but only that the trend is changing. So on the break of TL switch to higher TF, to get the bigger picture & also to lower TF to see whether new trend is developing.
e) Also, if the higher TF TL is broken on lower TF, then more often than not, there will be a pullback rally to the TL, to retest it.
That's all that comes to my mind right now....& I apologize if I've written things haphazardly, as I don't hv anything written down just posting what came to my mind.