It's really annoying to trade such scam exchange with fake volumes. That's why I avoid using that exchanges. Better to use and trade on top exchanges with real volume and traders like binance.
lots of fake volumes that can sometimes trick exchange users in the wrong direction.
The fake volume aspect with exchanges with low reputation such as vindax, p2pb2b is alarming. Also wash trading is excessive in such exchanges. I remember setting a sell order on p2pb2b, it didn't pick for almost 24 hours but when I checked trade history for that pair, I saw orders with prices even higher than mine on the list after the time I placed my sell order. I think coingecko and Coinmarketcap did some upgrade to tackle the issue of fake volume, liquidity feature was also embedded for CMC in this regard. We should be careful with new exchanges especially, I only trade on reputable exchanges with huge volumes / liquidity.