I wouldnt recommend trading in this exchange.
Instead of 0.00000015 (15 sat) they are placing 0.000000151 (15.1 sat?) orders with one more decimals.
It can confuse people easily. Better stay away from that exchange! Use another.
that has always been known for ages. It's actually EXTREMELY useful for super low value coins.
how is this useful?
for example. coins that are worth nothing literally nothing on other pools can still go for several "mini" satoshi. DOGE trading and so on. it's pretty much a deep cheap coin trading tool. I don't use it but I know people who use coinsmarkets for that purpose.