Due to the cost of settling each and every order ‘on chain’, the minimum required order sizes when using the portal become higher compared with ethfinex.com.
Minimum order sizes vary from token to token, but they are approximately $25 (or equivalent). Any orders smaller than this will not make it to the order book.
This minimum may be dynamically adjusted based on demand and network congestion.
The fees on the portal are fixed at 0.25% for every executed order.