What is the correct way to use indicator?

Lets take an example of supertrend, what is the difference between these 4 , lets take 5 min timeframe

  • Close(0) Crosses above Supertrend(7,3,0)
  • PrevN(-1,5) Crosses above Supertrend(7,3,0)
  • Supertrend(7,3,0) crosses above Close(0)
  • Supertrend(7,3,0) crosses above PrevN(-1,5)