mermaid

default

markdown

[[_TOC_]]

[Cheat sheet](https://jojozhuang.github.io/tutorial/mermaid-cheat-sheet/)

[mermaid play ground](https://www.mermaidchart.com/play)

# Examples
## Flowchart
# 
```mermaid
flowchart LR

A[Hard] -->|Text| B(Round)
B --> C{Decision}
C -->|One| D[Result 1]
C -->|Two| E[Result 2]

```

## Sequence diagram
```mermaid
sequenceDiagram
Alice->>John: Hello John, how are you?
loop HealthCheck
    John->>John: Fight against hypochondria
end
Note right of John: Rational thoughts!
John-->>Alice: Great!
John->>Bob: How about you?
Bob-->>John: Jolly good!
```

## Gant Chart

```mermaid
gantt
    section Section
    Completed :done,    des1, 2014-01-06,2014-01-08
    Active        :active,  des2, 2014-01-07, 3d
    Parallel 1   :         des3, after des1, 1d
    Parallel 2   :         des4, after des1, 1d
    Parallel 3   :         des5, after des3, 1d
    Parallel 4   :         des6, after des4, 1d
```

## Class Diagram

```mermaid
classDiagram
Class01 <|-- AveryLongClass : Cool
<<Interface>> Class01
Class09 --> C2 : Where am I?
Class09 --* C3
Class09 --|> Class07
Class07 : equals()
Class07 : Object[] elementData
Class01 : size()
Class01 : int chimp
Class01 : int gorilla
class Class10 {
  <<service>>
  int id
  size()
}

```

## State diagram

```mermaid
stateDiagram-v2
[*] --> Still
Still --> [*]
Still --> Moving
Moving --> Still
Moving --> Crash
Crash --> [*]
```
## Pie chart

```mermaid
pie
"Dogs" : 386
"Cats" : 85.9
"Rats" : 15
```

## Bar chart

```mermaid
gantt
    title Git Issues - days since last update
    dateFormat  X
    axisFormat %s

section Issue19062
    71   : 0, 71
    section Issue19401
    36   : 0, 36
    section Issue193
    34   : 0, 34
    section Issue7441
    9    : 0, 9
    section Issue1300
    5    : 0, 5
```

## User Journey diagram

```mermaid
  journey
    title My working day
    section Go to work
      Make tea: 5: Me
      Go upstairs: 3: Me
      Do work: 1: Me, Cat
    section Go home
      Go downstairs: 5: Me
      Sit down: 3: Me
```

## C4 diagram

```mermaid
C4Context
title System Context diagram for Internet Banking System

Person(customerA, "Banking Customer A", "A customer of the bank, with personal bank accounts.")
Person(customerB, "Banking Customer B")
Person_Ext(customerC, "Banking Customer C")
System(SystemAA, "Internet Banking System", "Allows customers to view information about their bank accounts, and make payments.")

Person(customerD, "Banking Customer D", "A customer of the bank, <br/> with personal bank accounts.")

Enterprise_Boundary(b1, "BankBoundary") {

SystemDb_Ext(SystemE, "Mainframe Banking System", "Stores all of the core banking information about customers, accounts, transactions, etc.")

System_Boundary(b2, "BankBoundary2") {
    System(SystemA, "Banking System A")
    System(SystemB, "Banking System B", "A system of the bank, with personal bank accounts.")
  }

System_Ext(SystemC, "E-mail system", "The internal Microsoft Exchange e-mail system.")
  SystemDb(SystemD, "Banking System D Database", "A system of the bank, with personal bank accounts.")

Boundary(b3, "BankBoundary3", "boundary") {
    SystemQueue(SystemF, "Banking System F Queue", "A system of the bank, with personal bank accounts.")
    SystemQueue_Ext(SystemG, "Banking System G Queue", "A system of the bank, with personal bank accounts.")
  }
}

BiRel(customerA, SystemAA, "Uses")
BiRel(SystemAA, SystemE, "Uses")
Rel(SystemAA, SystemC, "Sends e-mails", "SMTP")
Rel(SystemC, customerA, "Sends e-mails to")
```

## XY-Chart
```mermaid
xychart-beta
    title "Marktperformance 2025: Monatliche Trends (Indexierte Werte)"
    x-axis ["Jan", "Feb", "Mär", "Apr", "Mai", "Jun", "Jul", "Aug", "Sep", "Okt", "Nov", "Dez"]
    y-axis "Performance (Start = 100)"
    
    %% Daten basieren auf realen 2025-Trends:
    %% Silber: Top Performer (+147-149% im Jahr)
    line [105, 115, 130, 150, 165, 180, 200, 215, 230, 240, 245, 249]
    
    %% Gold: Starkes Jahr (+60-65%), Peak im Dezember bei ca. $4.550
    line [108, 112, 110, 118, 125, 130, 135, 142, 148, 155, 158, 165]
    
    %% S&P 500: Solides Wachstum (+16,4%), Tech-getrieben
    line [103, 105, 104, 102, 107, 109, 111, 113, 114, 115, 116, 116.4]
    
    %% Bitcoin: Volatil, Allzeithoch im Okt (ca. $104k), Korrektur im Dez (ca. $87k)
    line [111, 105, 83, 75, 91, 92, 103, 102, 98, 115, 92, 97]
    
    %% Western Digital (WDC) - Top Aktie, +261%
    line [100, 105, 120, 145, 160, 180, 210, 230, 250, 280, 310, 361]
    
    %% SVS Baker Steel Fund - Top Fonds, +171%
    line [100, 110, 125, 135, 140, 150, 160, 175, 190, 210, 230, 271]
    
    %% Micron Tech (MU) - Zweitbeste Aktie, +178% (basierend auf Jan-Dez Preis)
    line [100, 105, 118, 130, 145, 160, 180, 200, 220, 260, 300, 320]
    
    %% Bitcoin (BTC) - Top Krypto, +16% (moderat im Gesamtbild)
    line [100, 103, 102, 98, 105, 108, 110, 107, 112, 120, 105, 116]
    
    %% WTI Crude Oil (Rohöl) - Verlierer, -19%
    line [100, 98, 92, 86, 84, 90, 95, 90, 88, 85, 83, 81]

```

```mermaid
xychart-beta
    title "Volatilitäts-Vergleich 2025: Micro-Caps vs. Markt (Kumulativ in %)"
    x-axis ["Jan", "Feb", "Mär", "Apr", "Mai", "Jun", "Jul", "Aug", "Sep", "Okt", "Nov", "Dez"]
    y-axis "Kumulative Rendite in %"

%% Micro-Cap Aktie (Stellvertretend für spekulative Peaks: +800% Peak, Crash am Ende)
    line [10, 50, 250, 450, 800, 600, 400, 300, 550, 700, 350, 150]

%% Silber: Top Rohstoff (+149% Jahresschluss)
    line [5, 12, 25, 45, 60, 75, 85, 105, 125, 135, 145, 149]

%% Kakao: Agrar-Volatilität (+163% Peak, dann Korrektur)
    line [15, 45, 100, 163, 150, 120, 90, 80, 75, 70, 72, 70]

%% Bitcoin: Krypto-Leader (Peak Okt, Korrektur Dez)
    line [12, 15, -5, -8, 20, 45, 60, 75, 90, 102, 40, 18]

%% S&P 500: Benchmark zum Vergleich (+16.4%)
    line [2, 1, -4, -5, 1, 6, 8, 10, 14, 16, 17, 16]
```

xychart-beta

## XY-Chart horizontal
```mermaid

xychart-beta horizontal
    title "Sales Revenue"
    x-axis [jan, feb, mar, apr, may, jun, jul, aug, sep, oct, nov, dec]
    y-axis "Revenue (in $)" 4000 --> 11000
    bar [5000, 6000, 7500, 8200, 9500, 10500, 11000, 10200, 9200, 8500, 7000, 6000]
    line [5000, 6000, 7500, 8200, 9500, 10500, 11000, 10200, 9200, 8500, 7000, 6000]
```

## Block diagram
```mermaid
block-beta
    columns 5
    A B C D:2
    E:4 F
    G:2 H:3
```

Uploading file...

Edit message:

Cancel

Editing mermaid