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I only like to trade against bitcoin and ether. When they all drop there isn't much to do, but when one rises or drops, there is profit to be made. I usually pick what I think is the medium price, and set a buy 5% below, and a sell 10% higher. The price will never go below zero fortunately which means I can buy near the same level every time, and I can sometimes gamble on selling at a higher price than before if I don't mind waiting.