@mindrust fees are 2-4% to convert from one currency to another, I think some exchanges charge 0.2-0.4% PER TRANSACTION which is insane and goes against the purpose of bitcoin imo.

Currently, with exchange fees in the 2-4% its difficult to make any profitable short sell because the price change needs to be 2-4+% in order to make profit.  Coinbase just increased their fees from 1% to 1.5% which makes a big difference for margin trading.  1.5% fee when buying bitcoin, then another 1.5% fee converting it to USD for a total of 3%.  Does anybody have any suggestions on how to make margin trades more effectively and not get reamed by exchange fees?
I tried playing different exchanges off each other, but in the end, when taking into consideration the fee differences, its about a wash.
Thank you very much!