Mast Therapeutics, Inc. (MSTX)

[okaly]

If you think that someone is responsible for "painting" this stock, up or down, then you have some work to do on understanding how market orders are handled.

These "paints" as you call them occur after 4pm (around 4:02 to be exact) and it is not possible to execute an order at that time. Look into the computer systems that handle trades, and the algorithms that control the stock market when volume is as non existent as it is right now, amd youll have a much better idea why this keeps happening.