Based on the ADX Gapper strategy described in the book Street Smarts, it looks to exploit retracement to a prevailing trend when there has been a gap away from the trend, giving you multiple potential entries. It uses the ADX to determine a trend and detects when there is a gap to signal an entry day where:
You would enter short if the DI-(red line) > DI+ (green line), ADX (blue area) > 30 indicating a strong trend and if there is a gap up from the previous day. If all the described conditions are met then you would place a short stop at the previous day highs and trail a stop until the end of the day. This strategy is meant to give you trades to hold for 1 day (the day you enter) or 2 days if you consider you should hold it overnight.