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PHP and JS Development Tips: Master the Method of Drawing Stock Candle Charts
PHP and JS Development Tips: Master the Method of Drawing Stock Candle Charts
With the rapid development of Internet finance, stock investment has become the choice of more and more people. In stock trading, candle charts are a commonly used technical analysis method. It can show the changing trend of stock prices and help investors make more accurate decisions. This article will introduce the development skills of PHP and JS, lead readers to understand how to draw stock candle charts, and provide specific code examples.
1. Understand the stock candle chart
Before introducing how to draw the stock candle chart, we first need to understand what a candle chart is. Candlestick chart is a graphic display method of stock prices invented by the Japanese. It can show the rise and fall of stock prices. A candlestick chart contains four prices: opening price, closing price, high price and low price. If the stock price rises during the day, the real body portion of the candle is filled, while it is empty if the stock price falls. In addition, there are two shadow lines above and below the candle chart, representing the highest price and the lowest price. By observing candle charts, investors can understand the market situation and make corresponding investment decisions.
2. Use PHP to draw candle charts
PHP is an open source server-side scripting language commonly used for web development. Here we will use PHP to draw candlestick charts. For convenience, we can use a PHP library to help us draw graphics. Here, we use PHPlot, a library that provides a simple and easy way to generate various types of charts, including candlestick charts. Here is a basic PHP code example:
<?php
require_once 'phplot.php';
$data = array(
array('2000-06-01', 12, 19, 8, 15),
array('2000-06-02', 18, 25, 16, 24),
array('2000-06-03', 23, 27, 20, 25),
array('2000-06-04', 22, 26, 20, 23),
array('2000-06-05', 20, 24, 18, 22),
array('2000-06-06', 19, 21, 13, 16),
);
$plot = new PHPlot(800, 600);
$plot->SetTitle("Stock Prices");
$plot->SetDataType("data-data");
$plot->SetDataValues($data);
$plot->SetPlotType("candlesticks");
$plot->DrawGraph();
?>In this example, we define an array named $data, which contains four values of the stock price, and the date. Next, we created a PHPlot object and set the chart's title, data type, and plot type. Finally, we called the DrawGraph() method to generate the candle chart. This way we can easily generate candlestick charts with various visualization effects.
3. Use JS to draw candle charts
In addition to PHP, JavaScript is also a very popular web development language, which can be used to generate dynamic content in the browser. Here we will use JS to create a stock candlestick chart. To achieve this goal, we can use a library called Highcharts, which provides a complete client-side stock charting solution. The following is a simple JS code example:
<!DOCTYPE html>
<html>
<head>
<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<script>
Highcharts.chart('container', {
chart: {
type: 'candlestick'
},
title: {
text: 'AAPL Stock Price'
},
xAxis: {
type: 'category',
labels: {
rotation: -45,
align: 'right'
}
},
yAxis: {
title: {
text: 'Price'
},
tickInterval: 10
},
series: [{
data: [
[1552300800000, 173.91, 175.5, 173.08, 174.97],
[1552387200000, 174.67, 175.49, 172.02, 173.15],
[1552473600000, 173.94, 174.67, 172.02, 173.32],
[1552560000000, 174.28, 175.15, 172.89, 174.87],
[1552646400000, 175.69, 177.75, 173.97, 175.53]
]
}]
});
</script>
</head>
<body>
<div id="container"></div>
</body>
</html>In this example, we have introduced the necessary JS files by importing the Highcharts library in the
tag. Next, we define a div container called container to store the stock candlestick chart. Then, we created a Highcharts chart object and configured the chart type, title, axis, data series and other properties. Finally, we bound the chart object to the container and displayed the stock candlestick chart in the browser.4. Summary
Stock candle chart is a very practical technical analysis method, which can help investors better understand the situation of the stock market. In this article, we explain how to draw stock candle charts by introducing development techniques in PHP and JS, and provide specific code examples. I believe that with this knowledge, readers can better apply candle charts to analyze the stock market and make more informed investment decisions.
The above is the detailed content of PHP and JS Development Tips: Master the Method of Drawing Stock Candle Charts. For more information, please follow other related articles on the PHP Chinese website!
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