Are you trading as taker or as maker? So are you placing your orders in orderbook (maker), or are you actively matching orders that are already in the book (taker)?

There are some exchanges that have 0% or even rebate when you are maker.
Eg. at Hitbtc you get 0.01% when you are maker:
https://hitbtc.com/fees-and-limits

I think also cex.io has 0% maker fee, but they do not have much coins.

So this would be perfect if you are maker.