Yeah when you go to sell they want that .25%! Bastardos! lol just kidding. This is good to know. Really, all you should do if making big purchases is just keep the price in mind you bought for and not settle (not sell) until the price goes up (for me 10% is usually good enough). Poloniex will do the math for you on the 24hr but not from the exact time you bought, which I think some people don't understand. They might think "ohhh look! Ethereum is up 25% I will sell!" But in reality they might've bought 3-4 days ago for more than what they're about to sell for. For this it's a good idea to view your trade history for that crypto, which will show up at the bottom of the Exchange page on Poloniex. You already know this, but it's more for people that might make the mistake of thinking they're making a profit because something is in the red, when in fact they might've bought higher than what they're about to sell for! Nice post dude.