A gap is an area on a price chart in which there were no trades. Normally this occurs between the close of the market on one day and the next day's open. More information is available at
Direction Date range up Feb-07-2014 7.27 to 7.4 up Dec-20-2013 5.58 to 5.67 up Nov-22-2013 2.81 to 3.3 down Oct-09-2013 16.48 to 6.1
"It is believed that 90% of gaps get closed."
Nevertheless, I do not see the gaps at 5s and 2s getting closed as the perception of fundamentals changed big time and those ones are totally irrelevant now.
One on 7.27 will very likely get closed on one of those days.