A 'bottom wick' can be formed on the monthly chart by having an all green/up week. When combined with the red candle at the monthly level - Creates the dynamic of a 'bottom' where the bears push price down to a limit and the bulls succeed in fighting back and bring price back up - and the bottom is formed.
Looking at the weekly chart for SPX or SPY their are relatively fewer examples of bottoms like this (also known as tweezers)
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