It could have been a feeler bid to see if someone had a higher ask order. A fill there may have at least momentarily raised the ask but let's say the bid may have been for 1000 @ 14 cents, the fill at .138 confirmed no sell orders of at least 1000 @ .14.
This tells where traders might or might not have orders and might be useful in formulating a trading strategy.
After closely watching this stock price for a long time, I have observed small trades that usually sink the price followed by a much larger trade at the then lowered price.
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