This chart is showing the Nasdaq 100 index with simple trend lines.
Interestingly there is the long term trend line from 2009 and more recently since 2016 what I would call an acceleration line which is a steeper angled trend line supporting price.
I have added a possible resistance line also for reference.
Also on this chart I have added the Bear market trend...
This is the Ftse 100 index with a simple trend line on the monthly chart.
I have placed an arrow to show where the market actually made a monthly candle close below the trend line but has since gone on to recapture it.
This is my first published idea and it's a simple one.
The Dow Jones monthly with added trend lines, I also joined the last three peaks with a trend line to keep an eye on.
I am watching for the monthly close of each candle with this analysis rather than intra month movements.
I hope this is helpful in some way :-)