Did you even read the article you linked to? Of course dollar cost averaging doesn't work when the market is only going up, but that's not what's happening right now. The one third of the time when DCA works is when the market experiences a wild swing in price and then returns back to where it started, which means that unless you actually expect the US economy to collapse and remain in a collapsed state for the rest of your life, dollar cost averaging is the strategy to employ in this situation.