The only things you need to know about market structure:
Swing high = highest point that caused the swing low.
Swing low = lowest point that caused the swing high.
What is the job of a swing high or swing low?
A low’s job is to make a new higher high.
And the high’s job is to make a new lower low.
It’s weak when it fails to accomplish it’s task.
Bullish market = series of strong lows.
Bearish market = series of strong highs.
Never use weak high/lows as resistance/support levels.
They will get broken through not long after.