Heiken Ashi is a very well known indicator.
One of the variations that is actually improving the indicator is the "smoothed" version. The logic behind the smoothed version is simple:

ADXVMA Binary
ADXVMA indicator made as "binary" having only two values (+1 for "trend" up and -1 for "trend" down).
Accumulative Swing Index Smoothed - Floating Levels
In this version of Accumulative Swing Index Smoothed indicator we are introducing a sort of levels that can be used for trend assessment.
Heiken Ashi Smoothed - Binary
Unlike the Heiken Ashi Smoothed, this indicator is displaying 2 values only: +1 for trend up and -1 for trend down, thus making it suitable for usage from experts.
WPR Candles
This indicator is a variation of a well known WPR (Williams Percent Range) indicator with 4 WPR values combined into "candles".