You're right, ADX is about the slowest thing out there. Personally, I don't use hardly any indicators anymore. I'll use one medium oscillator for divergances and one volume based indicator... that's it. And in their own window, never on the chart window. I keep the price naked. All these indicators are just derivatives of price. Now you can use the latest computer (quad core) that processes about 59,000 MIPS (Million instructions per second) to determine trends and price action... or you can use your brain which has a processing speed of 100,000,000 MIPS. Which do you think can do a better job of evaluating a price chart? I found that I was trading the indicators, not the price. Once I stripped all the indicators away, my profitability increased about 40%. This takes time though. Personally, it took me five years. Others maybe much more or much less.
If that just won't work for you, then print the chart, hang it on the wall and call a five year old kid over and ask him if it's going up or down. If he can't tell, it's sideways. (In other words: use his 100million MIPS computer if your own isn't working) Kids have the huge advantage of not being biased in any way. Hmmm, Maybe I need to put a daycare on retainer???