Closing the Gap 217 Concluding Comments about Closing the Gap As we have talked to a number of traders, the most fre- quent question about gaps is, "Doesn't a gap always close?" Based on the calculations, it appears that gaps may tend to close in roughly one trading week (5 days). For the sample of 10,766 gaps during the period January 1 to June 30, 2010, the median time to close for up gaps was 5 days, whereas the median time for down gaps to close was 6 days. Some of the gaps observed had still not closed more than 1 1 / 2 years later. Throughout this book, gaps have been discussed using daily bars. Sometimes a stock opens above the previous day's high or opens below the previous day's low, but subsequent price movement during the day