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Beginner's Guide: How to Draw Stock Candlesticks Using PHP and JS

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Dec 17, 2023 am 10:23 AM

phpjsStock Candle Chart

Beginners Guide: How to Draw Stock Candlesticks Using PHP and JS

Getting Started Guide: How to Draw Stock Candle Charts Using PHP and JS

Introduction:
Stock candle charts are a commonly used chart type in stock market technical analysis. It can visually display stock price trends and trading activities. This article will introduce how to use PHP and JS to draw stock candle charts, and provide specific code examples to help readers get started.

Part One: Setting up the environment and preparations
Before starting, we need to ensure that the relevant environments for PHP and JS have been installed in the system. If PHP is not installed in the system, you can download the installation package through the official website (https://www.php.net) and install it. JS is a scripting language that runs in the browser and requires no additional installation.

Part 2: Obtaining Stock Data
Before drawing a candle chart, we first need to obtain the historical data of the stock. Data can be obtained through the interface of the stock exchange or a third-party data provider. This article will use a hypothetical data set as an example.

The sample data format is as follows:

[
  {
    "date": "2022-01-01",
    "open": 100,
    "high": 110,
    "low": 90,
    "close": 105
  },
  {
    "date": "2022-01-02",
    "open": 105,
    "high": 120,
    "low": 100,
    "close": 115
  },
  ...
]

Each data object represents a day's trading, including date, opening price, highest price, lowest price and closing price.

Part Three: Draw Candlestick Chart

Create HTML Page
First, create an HTML file to display the candle chart. In the HTML file, you need to introduce the Chart.js library:

<!DOCTYPE html>
<html>
<head>
  <title>股票蜡烛图</title>
  <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
</head>
<body>
  <canvas id="candlestick-chart"></canvas>
</body>
</html>

Write JS code
Add the following JS code in the HTML file to obtain stock data and draw candle charts:

<script>
  // 获取股票数据
  const stockData = [
 // 这里填入获取的股票数据
  ];

  // 转换数据格式
  const chartData = stockData.map((data) => ({
 t: new Date(data.date),
 o: data.open,
 h: data.high,
 l: data.low,
 c: data.close
  }));

  // 绘制蜡烛图
  const ctx = document.getElementById('candlestick-chart');
  new Chart(ctx, {
 type: 'candlestick',
 data: {
   datasets: [{
     label: '股票价格',
     data: chartData
   }]
 },
 options: {
   // 可根据需要进行配置，如设置图表样式、颜色等
 }
  });
</script>

Part 4: Run the code and view the results
Save the above HTML file as a separate file (such as candlestick.html), and open the file through the browser to run code to view the effect of the drawn candle chart.

Summary:
In this article, we introduced how to draw stock candle charts using PHP and JS, and provided specific code examples. By learning these basics, readers can further learn and explore how to use more charting libraries and techniques to display and analyze stock data. I hope this article can be helpful to readers, and I wish you all success in the stock market!

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