Thank you for the detailed answer and clarification ,I think that this information will be useful to anyone who is not yet familiar with this exchange and wants to trade there, including iDNA 
Speaking of which. Vitex thinks that all of their users are dumb and don't even know where is order book and last orders. Just take a look at that:
Only buy orders each 7-12 min, 10-30 iDNA (1-3 $ XD) orders on second and third ss. This looks so unreal. But take a look at that. Today one guy created sell order in a way that there is 1 sat spread.
What should happened if normally with 15% spread people are making orders each 10 min? They should trade even more with low spread shouldn't they? In fact there was not a single trade in last 7 hours because with 1 sat spread it is impossible for their bot to do fake trades.
Why exchanges cheat in the most stupid way without even taking care of hiding fake trades? Only buy orders with rand 7-10 min delay and 1-3$ order size. Pathetic.