I thought this of interest in an article I read today by Daryl Guppy. There are always different opinions on the correct positioning of trendlines, how many highs/lows to pick up, upper or lower wicks to include or go straight through etc. but he posted this one which I first thought was a bit strange but his reasoning does make sense.
"The trend line that defines the trend does not start from December 2018. The trend line starts from January 2019 because this line most accurately captures the subsequent S&P trend development with four trend line anchor points. The break below the line is substantial so it has to be treated as a downtrend break."