There was a discussion recently on another forum regarding stocks that have been in the $2 to $4 range for a year or two. People are claiming some of these stocks will shoot up to $15 to $20 for a day or two, then come back down to the original price. The percentage increase is much larger than a typical squeeze, over 200%. The volume is very large and the moves happen in minutes. Any swing and positional shorts are taken out easily. Has anyone here witnessed moves like these on daily or weekly charts without any possible news related cause?