As the name implies this Pine script is an indicator used to flag market bottoms.
Can it then be used for shorting? or in different timeframes for trading? Absolutely why not, in fact someone asked if we can incorporate this as a feature:

Now 3-Checkmark CCU market bottom offers:
- backtesting and alerts for long and short signals
- disable shorts toggle
The main purpose of the indicator is still to find bottoms using the 2 day timeframe (longs) but now you can use if for any setup if you want to.
