I have read that 2 out of every 3 gaps are filled. Has anyone studied this? Is there any good reading materials on gaps, their tendancies, etc.?
Suggest you read Brandon's thread, starting here: http://www.elitetrader.com/vb/showthread.php?s=&threadid=5243&perpage=6&pagenumber=20 He discusses gaps, probability of filling, etc.