public void setTrendVisible(final boolean VISIBLE) {
        if (null == trendVisible) {
            _trendVisible = VISIBLE;
            fireTileEvent(VISIBILITY_EVENT);
        } else {
            if (!trendVisible.isBound()) {
                trendVisible.set(VISIBLE);
            }
        }
    }
Defines the visibility of the trend indicator in the TimelineTileSkin
@param VISIBLE
src/main/java/eu/hansolo/tilesfx/Tile.java