ZEC short positions can be closed now, currently at an average price of 530 and 585 or opened at better positions than mine. With the same leverage, going short should be able to make a 10% profit. If it drops below 500 and I haven't closed, it's because I think it can continue to fall along with the mainstream. But now, the counter-trend rise isn't a good sign, so there's no need to hold the short positions anymore; just take the profit and exit.