# Tikz: How to create arrow with two corners?

My problem is very similar to this question. However, I'm unable to use this solution in my figure.

I want to connect two nodes with an arrow which has two corners. Here is my code:

\documentclass[12pt]{article}
\usepackage{setspace,amsmath,graphicx,float}
\usepackage[english]{babel}
\usepackage[natbibapa]{apacite}
\usepackage{times}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows,arrows.meta,positioning,calc}
\begin{document}
\begin{figure}[H]
\centering
\tikzstyle{block} = [draw, rectangle, minimum height=5.5em, minimum width=19em]
\tikzstyle{smallblock} = [draw, rectangle, minimum height=5.5em, minimum width=9em]
\tikzstyle{input} = [coordinate]
\tikzstyle{output} = [coordinate]
\tikzstyle{pinstyle} = [pin edge={to-,thin,black}]
\begin{tikzpicture}[auto,node distance=7cm,>=latex',align=center]
\node [input, name=input] {};
\node [block, rounded corners=5pt, right of=input] (A) {Start with the narrowest product\\ or geographic market definition.};
\node [block, rounded corners=5pt, below of=A, node distance=3.5cm] (B) {Is it profitable for a monopoly producer of\\ that product to increase prices in a small but\\ significant and nontransitory way?};
\node [block, rounded corners=5pt, below of=B, node distance=3.5cm] (C) {There must be at least one good substitute\\ excluded from the current market definition.\\ Expand the market to include it.};
\node [block, rounded corners=5pt, below of=C, node distance=3.5cm] (D) {Now have a multiproduct monopolist.\\ Could he profitably raise prices?};
\node [smallblock, rounded corners=5pt, right of=D, node distance=8cm] (E) {Stop.\\ Market definition\\ is wide enough.};
\draw [-{Latex[length=3mm]}] (A) -- node[auto][name=1] [right]{} (B);
\draw [-{Latex[length=3mm]}] (B) -- node[auto][name=2] [right]{No} (C);
\draw [-{Latex[length=3mm]}] (C) -- node[auto][name=3] [right]{} (D);
\draw [-{Latex[length=3mm]}] (D) -- node[auto][name=4] [above]{Yes} (E);
\draw [-{Latex[length=3mm]}] (B) -| node[near start][name=5] [above]{Yes} (E);
\draw [-{Latex[length=3mm]}] (D) -- +(0,1)|- node[auto][name=6] [left]{No} (C);
\end{tikzpicture}
\caption[Illustration of an HMT decision tree]{Illustration of an HMT decision tree \citep{QuantTech}.}\label{AlgorithmHMT}
\end{figure}
\end{document}


I want to connect block D with C (see the last \draw), but the code -- +(0,1)|- node (as in the other question) does not work. I tried to alter it of course, but I'm not really making progress.

Like this?

(I guess that you like to have something like the above picture)

• deprecated \tikzstyle{<name>} = [...] I replace with options of tikzpicture as <name>/.style = {....} (see MWE below)
• with tikzlibrary{positioning} the correct syntax is for example left=of <node name>
• for node distance I consider positioning again and define node distance = <vertical> and <horizontal>. for distance I select far smaller lengths than you (otherwise the picture is out of page)
• for relative positioning with + you need explicit to define anchor of node: (D.west) -- + (-1,0).

Complete MWE:

\documentclass[12pt]{article}
\usepackage{setspace,amsmath,graphicx,float}
\usepackage[english]{babel}
\usepackage[natbibapa]{apacite}
\usepackage{times}
\usepackage{tikz}
\usetikzlibrary{arrows, arrows.meta, calc, positioning, quotes, shapes}

\begin{document}
\begin{figure}
\centering
\begin{tikzpicture}[
auto,
node distance = 11mm and 22mm,
base/.style = {draw, rounded corners=5pt, minimum height=5.5em,
align=center},
block/.style = {base, minimum width=19em},
smallblock/.style = {base, minimum width=9em},
]
\coordinate (in);
or geographic market definition.};
\node [block,below=of A ] (B) {Is it profitable for a monopoly producer of\\
that product to increase prices in a small but\\
significant and nontransitory way?};
\node [block,below=of B ] (C) {There must be at least one good substitute\\
excluded from the current market definition.\\
Expand the market to include it.};
\node [block,below=of C ] (D) {Now have a multiproduct monopolist.\\
Could he profitably raise prices?};
\node [smallblock,right=of D] (E) {Stop.\\
Market definition\\
is wide enough.};
\draw [-{Latex[length=3mm]}]
(A) edge                    (B)
(B) edge ["No"]             (C)
(C) edge                    (D)
(D) edge ["Yes"]            (E);
\draw [-{Latex[length=3mm]}]
(B) -| node[pos=0.25,name=5] {Yes} (E);
\draw [-{Latex[length=3mm]}]
(D.west) -- +(-1,0) |- node[pos=0.25] {No} (C);
\end{tikzpicture}
\caption[Illustration of an HMT decision tree]
{Illustration of an HMT decision tree \citep{QuantTech}.}
\label{AlgorithmHMT}
\end{figure}
\end{document}

• Thank you so much @Zarko! That's exactly what I wanted and I'm glad that I have a working sample of a pro. I picked my code up from various sources and I knew it was amateurishly done. Now I finally have something to analyse how it is done correctly. – Malganas Dec 28 '16 at 15:57