DislikedYou're right Rabid, but in the context of rise and fall, Forex has no 'up' or 'down'Ignored
So when the market drops, USD-based pairs tend to drop too. Since the general market drops fast, those USD-based pairs are going to be forced down fast too. To put it in a general form, USD strength has been moving faster (lately) than USD weakness. In that way, pairs like the USDCHF actually move up faster than they move down. Or at least they did last year.
Keep in mind that the general market hasn't always been this way. It used to be the other way around.