Not sure about MNGA but SQNS was closed down with a sell after the market closed. There was an order that went off at 1.67 at 4 minutes after the close. It was painted down IMO. Other wise we would of had a a close of 1.70
SQNS was traded after the close. Looks like a short term trader sold going into the weekend. In wouldn't worry about the small daily moves. Hang on. One day soon you will wake up to this being over 4