Could just be somebody has an automatic trigger to buy anything under $1.40, somebody posts a trade at $1.35 and it gets snapped up and all other trades until its back up to $1.40 then they stop buying. There's a lot of automated stock market transactions. Just suck to be the person selling at $1.35 when they could have got $1.40. Reverse if you are stupid enough to sell well below valuation then somebody will shark them and put them back on the market straight away at the higher market value, instant profit for no work.