If there is no huge red candle, do you have an example of when you would take a mean-reversion long?

The best example is a huge red candle undercutting all the support, probably into the weekly 21 EMA. That would be the spot where I'd take a mean-reversion long. If we only get a few days of orderly movement lower, without panic selling or an acceleration to the downside, I'm probably not going to take it. We may need a little longer for the base. It depends on the character of the move.