What advantage do I have using this exchange over the internal exchange?
I think here is some advantage:
1. you can use light wallet/mobile wallet trade.
2. trade engine of call auction is good, you can make deal with a more better price if you don't care about wait some time.
for example, there is a bid order at price 0.051 now, but the price is down to 0.049 at btc38,
so someone should make an ask order at price 0.05 or 0.049, the final price will change to 0.049.
there are enough time to compete the price for ask order and bid order.