If your trying to get rid of 500k shares at .15, strategy is pretty easy put some small orders in around .15. That would be my advice, any other strategy wouldnt make sense, unless your trying to do something else, like trade those shares. Is that a reason?
My question? How many people dumped their shares last week between .04 and .044, off of advice that we would go back down to .036 or lower, go look at the volume of shares traded there, ridiculous on a stock heavily undervalued with good news. That advice cost individuals some good gains and now they are shareless. Go long and hold until you hit your objective.