I have 15000 LEDU token to sell. I deposited those on the DCOIN exchanger and placed sell orders. My order was the bottom of all the orders. After a few hours, I noticed some orders in the history that have been sold for lower rate than mine.
After that, I keep watching the exchanger and noticed that buy orders are coming in order history I mean in history it's showing that someone is buying tokens lower than in my rate. But at that moment there were no orders lower than mine. How is it possible? are they using bots for showing fake volume??

Can anyone explain?