The trading volume on the DEX is growing every day thanks to increased adoption.

Also, the use of bitAssets by AEX.com is really helping as well.

To clarify, OpenLedger is a third party provider that is built upon the BitShares blockchain and shares the same order book. They offer features that the BitShares DEX cannot provide. Like fiat deposit and withdraw and deposits and withdraws of coins from other blockchains like BTC and ETH.

You can actually use your existing Username and Password to access your BitShares wallet from any of the gateways.

You can find a list of all the gateways in the Quick Reference Guide I made. http://bit.ly/BTS_Quick_Reference_Guide

You may want to check out crypto-bridge.org because they offer some very popular trading pairs and their volume is growing rapidly.