# Tendency indicator for bar charts

I´d like to add an indicator to my bar chart to indicate which values are better. For example sales per days: bigger/more = better vs. bankruptcies per mio residents: less = better).

Q: How do you call such an "indicator" and how can I generate one with LaTeX (like tikzpicture or bchart)?. It would also be nice to use this indicator-icon within the text.

Here is an example of a bar chart depicting a hardware performance comparison (notice the small indicator at the lower right corner, stating "► Besser" ("Besser" = better [german]).

There are tons of such symbols available. This answer is only to tell you that, if you are thinking of building your own with TikZ, you may want use a \savebox when using it in a bar chart by pgfplots.

\documentclass[tikz,border=3.14mm]{standalone}
\usepackage{pgfplots}
\usetikzlibrary{patterns}
\pgfplotsset{compat=1.16}
\newsavebox\myarrow
\sbox\myarrow{\tikz[baseline]{\fill[blue](0,0.2) --(0.2,0.1) -- (0,0);}}
\begin{document}
\begin{tikzpicture}[font=\sffamily]
\begin{axis}[xbar,enlargelimits=0.15,
symbolic y coords={Vancouver Island,Yellow bellied,Alpine},
ytick={Vancouver Island,Yellow bellied,Alpine},
title={Growth of marmot population (\usebox{\myarrow} is better)}]