Two ways to play:
First Way: When price breaks below today (10/30) low, put in a buy stop at the low price. That way if it continues to break down you don't take a position and if it recovers after running the stop you get in. At least that how it works in an ideal world. Normally I just watch the trading and manually enter the order, because it'll generally chop around the low.
Second Way: The second way is to buy on strength over today's candle. This doesn't provide as good risk/reward as your stop is below the most recent low (currently about $21), but the likelihood of success is slightly greater.
I'm not partial to either method, if price action breaks today's low and recovers in the same day, I'll get long there. If today's low doesn't get retested and instead we go for the gap fill in the next two days (as happened last time), then I'll buy on strength as in the second scenario.