It has nothing to do with market maker "manipulation", some one sold a bunch of shares, around 6k from the looks of it. It's very thin during AH, so if anyone sells a decent amount of shares it knocks out the market makers and drops the price a lot, same thing if anyone buys a large block....
It has nothing to do with any type of manipulation, this is just simply how buying and selling works after hours on a thin stock such as this....
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