To do any transaction in EtherDelta now we have to higher the gas. Sometimes it is never executing that until we increase the gas to 50 gwei. This is around 5 USD. This is big cost for small transactions. Do you know any best practices we need to follow when doing deposit, withdraw and trades in EtherDelta (specially in these days)?
In reality, there's nothing you could do if you want to trade.
Lower gas == More waiting for transaction confirmation. I found this site for checking the right gas price
https://ethgasstation.info.
I think you can not do anything too with etherdelta. If not increase the gas price, you might ending with failure transaction but you still have to pay the gas. Double fail.