If indicators give a similar reading for "fairly different" price actions, then blame the user, not the unthinking, mechanical, algebra. No so-called "indicator" should be used right out of the box, but 99% of traders do just that.
Price itself is also an indicator of "things to come" -- but there is nothing particularly special about an instantaneous price, an EMA, a WMA, an SMA, or a left-handed monkey wrench. Instant price is mostly noise. Indicators are mostly dampeners. The right mix between discerning signal from noise WILL CHANGE from day to day, hour to hour, and sometimes ("with a wipe of the brow") minute to minute. To not periodically check your indicators (including candle-lengths) for relevancy, AND TO ADJUST THEM as necessary to be responsive to the market de jore, is asking for pain.
One thing that helps immensely, is that other ONLY ORIGINAL piece of data from a transaction: volume. You (and others) ignore volume at your peril.
{getting off the soapbox now....}